[11:06:05] EX2107_DIVE07 Test message [12:13:24] johnreed leaves the room [12:25:45] EX2107_DIVE07 ROV Launch [12:33:42] EX2107_DIVE07 ROV on Surface [12:34:32] EX2107_DIVE07 ROV Descending [12:36:15] LAT : 30.221881 , LON : -76.221286 , DEPTH : 35.261 m, TEMP : 25.84708 C, SAL : 36.57125 PSU, DO : 6.68757 mg/l, TURBIDITY : 0.7326 FTU [12:41:15] LAT : 30.223289 , LON : -76.220881 , DEPTH : 105.5941 m, TEMP : 20.84208 C, SAL : 36.79777 PSU, DO : 6.45853 mg/l, TURBIDITY : 0.8364 FTU [12:46:16] LAT : 30.223963 , LON : -76.220419 , DEPTH : 266.3172 m, TEMP : 19.12385 C, SAL : 36.67262 PSU, DO : 6.72168 mg/l, TURBIDITY : 0.8669 FTU [12:51:16] LAT : 30.223832 , LON : -76.220322 , DEPTH : 409.4617 m, TEMP : 18.43258 C, SAL : 36.57565 PSU, DO : 6.41504 mg/l, TURBIDITY : 0.8913 FTU [12:56:16] LAT : 30.223968 , LON : -76.22002 , DEPTH : 566.3995 m, TEMP : 16.02924 C, SAL : 36.17231 PSU, DO : 5.58634 mg/l, TURBIDITY : 0.8913 FTU [13:01:17] LAT : 30.224345 , LON : -76.220052 , DEPTH : 718.4859 m, TEMP : 13.22089 C, SAL : 35.72446 PSU, DO : 5.00744 mg/l, TURBIDITY : 0.8852 FTU [13:06:17] jasonchaytor leaves the room [13:06:18] LAT : 30.224343 , LON : -76.220148 , DEPTH : 867.9347 m, TEMP : 9.60005 C, SAL : 35.26767 PSU, DO : 4.69421 mg/l, TURBIDITY : 0.8913 FTU [13:07:07] johnreed leaves the room [13:11:18] LAT : 30.224226 , LON : -76.220229 , DEPTH : 1016.6782 m, TEMP : 6.97466 C, SAL : 35.12181 PSU, DO : 5.91707 mg/l, TURBIDITY : 0.8913 FTU [13:12:44] Good morning. We are making our way to bottom (as can be seen from the okexnav posts). Looking forward to this one! [13:13:05] jasonchaytor leaves the room [13:13:48] Bottom expected at about 10:25 [13:15:04] *10:35 rather. First sample today was water for eDNA processing at 500 meters. [13:16:19] LAT : 30.224067 , LON : -76.220371 , DEPTH : 1164.9271 m, TEMP : 5.21177 C, SAL : 35.05734 PSU, DO : 7.48879 mg/l, TURBIDITY : 0.8852 FTU [13:16:52] Hi Allen. You there? [13:18:45] allencollins leaves the room [13:21:19] LAT : 30.223968 , LON : -76.220607 , DEPTH : 1326.3863 m, TEMP : 4.53986 C, SAL : 35.0118 PSU, DO : 8.05464 mg/l, TURBIDITY : 0.873 FTU [13:21:37] Yes I am. Hi Mike [13:21:57] Just multitasking of course. Working on Dive Summary from yesterday. [13:22:10] i just sent you a question via email. [13:22:38] And I just replied in the affirmative [13:22:48] ok [13:24:10] allencollins leaves the room [13:26:20] LAT : 30.2239 , LON : -76.220873 , DEPTH : 1482.027 m, TEMP : 4.22342 C, SAL : 34.98513 PSU, DO : 8.21122 mg/l, TURBIDITY : 0.8791 FTU [13:31:21] LAT : 30.223834 , LON : -76.221127 , DEPTH : 1635.9115 m, TEMP : 4.04295 C, SAL : 34.98241 PSU, DO : 8.19569 mg/l, TURBIDITY : 0.873 FTU [13:36:22] LAT : 30.223661 , LON : -76.221528 , DEPTH : 1784.3884 m, TEMP : 3.91338 C, SAL : 34.98072 PSU, DO : 8.20597 mg/l, TURBIDITY : 0.8669 FTU [13:41:22] LAT : 30.223417 , LON : -76.221674 , DEPTH : 1926.8987 m, TEMP : 3.69846 C, SAL : 34.9655 PSU, DO : 8.31218 mg/l, TURBIDITY : 0.8669 FTU [13:41:40] Good morning Stephanie and Allen- the MB looks awesome. Can't wait for this dive. [13:44:10] Definitely excited for this one John. Present expectation for bottom arrival is indeed ~~10:25, ~~14:25 UTC. Nice! [13:44:55] Dive plan call still set for 10:15 (14:15 UTC) [13:46:21] allencollins leaves the room [13:46:22] LAT : 30.223267 , LON : -76.221966 , DEPTH : 2074.8468 m, TEMP : 3.51946 C, SAL : 34.95446 PSU, DO : 8.35633 mg/l, TURBIDITY : 0.873 FTU [13:47:20] johnreed leaves the room [13:47:21] jasonchaytor leaves the room [13:51:22] LAT : 30.223086 , LON : -76.221942 , DEPTH : 2221.1099 m, TEMP : 3.28717 C, SAL : 34.94631 PSU, DO : 8.29878 mg/l, TURBIDITY : 0.8791 FTU [13:53:41] allencollins leaves the room [13:56:15] allencollins leaves the room [13:56:23] LAT : 30.223186 , LON : -76.222026 , DEPTH : 2377.2754 m, TEMP : 3.0948 C, SAL : 34.93868 PSU, DO : 8.32402 mg/l, TURBIDITY : 0.873 FTU [13:57:18] stephaniefarrington leaves the room [13:58:41] allencollins leaves the room [13:59:41] jasonchaytor leaves the room [14:01:23] LAT : 30.223066 , LON : -76.222104 , DEPTH : 2523.0087 m, TEMP : 3.01289 C, SAL : 34.9349 PSU, DO : 8.33405 mg/l, TURBIDITY : 0.8669 FTU [14:06:23] LAT : 30.222645 , LON : -76.222262 , DEPTH : 2664.9216 m, TEMP : 2.92929 C, SAL : 34.93168 PSU, DO : 8.32067 mg/l, TURBIDITY : 0.9158 FTU [14:07:21] KevinRademacher leaves the room [14:11:24] LAT : 30.22219 , LON : -76.222209 , DEPTH : 2803.6304 m, TEMP : 2.81815 C, SAL : 34.92583 PSU, DO : 8.35801 mg/l, TURBIDITY : 0.8608 FTU [14:11:51] UPDATE on TIMING TO BOTTOM: Currents are not playing nice, have shifted and we need to maneuver to get to where we want, so our expected bottom time is delayed, perhaps up to one hour. [14:12:21] Pre-dive call still set for 10:15, in 3 minutes [14:13:58] allencollins leaves the room [14:16:25] LAT : 30.222152 , LON : -76.222211 , DEPTH : 2803.3046 m, TEMP : 2.86257 C, SAL : 34.9274 PSU, DO : 8.32636 mg/l, TURBIDITY : 0.8486 FTU [14:21:26] LAT : 30.22204 , LON : -76.222536 , DEPTH : 2803.9905 m, TEMP : 2.95843 C, SAL : 34.92944 PSU, DO : 8.30023 mg/l, TURBIDITY : 0.8608 FTU [14:22:09] Scott--Most likely it is just a limestone bench on the slope. [14:22:58] I can barely hear with people talking over you, but probably this is just sorta typical of the morphology of limestone outcrops e.g. as you drive around the Midwest and see these relatively flat-lying limestones that erode back in places and form little benches before another relatively vertical spot [14:23:47] @Carolyn: thanks for that explanation. I think that is good stuff for general public to hear so they can match what we see underwater with what they may see around them. [14:24:05] @Carolyn: it is a constant fight with my phone and the audio! [14:24:56] johnreed leaves the room [14:25:18] Thanks Carolyn. Will relay that observation when we land and get started. [14:25:33] i might call in later....multitasking today. If Derek wants to shoot me an email when it would be good to provide some geo background, i would potentially call in and say something. [14:26:27] LAT : 30.221796 , LON : -76.222817 , DEPTH : 2803.565 m, TEMP : 2.96829 C, SAL : 34.93132 PSU, DO : 8.28892 mg/l, TURBIDITY : 0.8608 FTU [14:26:29] the bathy that derek showed in the long view with the blue shading really highlighted that "moat" that Charlie Paull and others discussed in that Mar Geo paper whose abstract I put in the chat yesterday.... [14:26:38] Carolyn, it would be great to hear from you. [14:31:27] LAT : 30.221811 , LON : -76.223109 , DEPTH : 2802.6936 m, TEMP : 2.97268 C, SAL : 34.93129 PSU, DO : 8.32598 mg/l, TURBIDITY : 0.8608 FTU [14:34:56] johnreed leaves the room [14:35:49] Rereading that Land et al. paper. Of note "the steepness and morphology of the canyon walls suggest that additional unidentified erosional processes are focused at the canyon heads" [14:36:05] Scott - on yesterday's dive, a few short bodied, unpigmented squat lobsters - Galatheid crabs - were observed. The depth of 3000+ m is rather deeper I think than the bathymetric limit of most Galatheids. If I recall correctly, you are a honcho in the ASPIRE (acronym right??) prioritization of species to collect. Seems to me that these very deep living squat lobsters may be undescribed - might be something to aspire for in terms of collections at today's dive to a similar depth. Martha Nizinski at NOAA Systematics-Smithsonian used to work on these, cannot recall whom else. Anyway, just suggesting something to consider [14:36:19] michaelvecchione leaves the room [14:36:21] emilycrum leaves the room [14:36:27] LAT : 30.221752 , LON : -76.223409 , DEPTH : 2803.2003 m, TEMP : 2.97443 C, SAL : 34.93243 PSU, DO : 8.29055 mg/l, TURBIDITY : 0.873 FTU [14:37:26] Ken, we tried to pick one up yesterday, but then it ducked into a rock crack. Was hoping to get one later in dive, but then the claw got stuck in an open position, preventing any further hopes of collecting. [14:39:44] Some years ago (2009) Scott and Les Watling led an ROV mission to the Bahamas deep basins. Now - talk about unusual erosional processes. There we observed absolutely vertical and sometimes overhanging carbonate cliffs and columns, going straight down several hundred meters of more. Very smoothly eroded, looking like aeolean sculpturing - no loose rocks, scant apparent layering. It is hard to imagine the physical processes that could have resulted in that dramatic erosional landscape. [14:39:56] allencollins leaves the room [14:41:07] Allen - on our Lophelia ROV missions in the Gulf of Mexico in 2003-2005, we collected a number of galatheids using the ROV suction sampler. They are too quick at the last moment for the manipulator claw, but vulnerable to suction [14:41:28] LAT : 30.221881 , LON : -76.223699 , DEPTH : 2803.486 m, TEMP : 2.89315 C, SAL : 34.9292 PSU, DO : 8.32081 mg/l, TURBIDITY : 0.8547 FTU [14:42:47] @Allen: and the start of that sentence in the Land et al paper reads "The recessed position of the canyons shelters them from the main flow of this abyssal current..." which gets to what I was suggesting yesterday about the area we surveyed (and perhaps today, although we are close to the canyon mouth and should be on steeper terrain). That is, perhaps the sponges were domninant because it was a sheltered cove type situation. [14:43:51] Thanks Ken for both those notes. For the suction sampler on D2, it requires the claw, for pulling out and getting into position. Fingers crossed we can get one today. [14:44:58] Also, we were a long way up from the strong abyssal currents. [14:45:49] At least that is how I read it. >2kt down in the "moat" at base. [14:46:06] johnreed leaves the room [14:46:28] LAT : 30.222029 , LON : -76.223996 , DEPTH : 2803.3188 m, TEMP : 2.98969 C, SAL : 34.93189 PSU, DO : 8.24351 mg/l, TURBIDITY : 0.8608 FTU [14:48:00] D2 above the edge of the canyon now. Have been pushed in that direction, so the maneuver is to get ROVs down onto the ledge rather than land on top. [14:48:08] And here is a link to the study I referred to yesterday about the "Anomalous abundances of deep-sea fauna on a rocky bottom exposed to strong currents" I had thought it was mainly about black corals, but that was a false memory! Obviously we've had a lot more exploration and visualization of the deep sea since this paper, and so while the densities are high, perhaps they are not as anomalous as once thought: https://www.sciencedirect.com/science/article/abs/pii/019801499290110F [14:48:49] carolynruppel leaves the room [14:49:27] allencollins leaves the room [14:51:24] @Allen: can you clarify last update? Is there a new plan to simply land on the top of the plateau, or are you saying the "delay" (not really a delay, I realize, but rather the current move) is to reposition the assets to get down to the small ledge on the canyon wall? [14:51:29] LAT : 30.22218 , LON : -76.224284 , DEPTH : 2802.9637 m, TEMP : 2.98332 C, SAL : 34.9331 PSU, DO : 8.31903 mg/l, TURBIDITY : 0.8547 FTU [14:52:24] Thanks Scott. The delay is to get to the correct position (or close to). No new plan. [14:52:36] along a wall with uneven architecture, there is probably both hydraulic current acceleration over curved surfaces, and frictional generation of eddies, plus the shadowing effect of upcurrent wall morphology. Complex stuff, but I would expect to see lush abundance of particulate feeders only where lateral currents are generally persistent, and conversely the relative dearth of such current-dependent feeders where shadowing is a persistent phenomenon. Lophelia mounds can generate currents up to 3 kn across their tops due to compression of currents and the hydraulic jump engendered at the crest of the mound. [14:52:40] A [14:52:56] johnreed leaves the room [14:53:02] nickbezio leaves the room [14:53:05] Copy that Allen. Thanks. [14:53:52] @Ken: bioengineers! [14:54:31] kensulak leaves the room [14:56:11] allencollins leaves the room [14:56:29] LAT : 30.222461 , LON : -76.224403 , DEPTH : 2803.2623 m, TEMP : 2.71371 C, SAL : 34.916 PSU, DO : 8.31442 mg/l, TURBIDITY : 0.8669 FTU [15:01:29] LAT : 30.222538 , LON : -76.224524 , DEPTH : 2803.3832 m, TEMP : 2.66816 C, SAL : 34.91969 PSU, DO : 8.33835 mg/l, TURBIDITY : 0.873 FTU [15:02:09] allencollins leaves the room [15:03:20] johnreed leaves the room [15:06:30] LAT : 30.222528 , LON : -76.224561 , DEPTH : 2802.8046 m, TEMP : 2.68056 C, SAL : 34.92005 PSU, DO : 8.37529 mg/l, TURBIDITY : 0.873 FTU [15:10:33] UPDATE, Will try to get to bottom where D2 is now. Over the edge, but not that far down. Just not able to move it against the current they are experiencing at depth [15:11:05] johnreed leaves the room [15:11:31] LAT : 30.222842 , LON : -76.224611 , DEPTH : 2908.7714 m, TEMP : 2.68276 C, SAL : 34.91957 PSU, DO : 8.36716 mg/l, TURBIDITY : 0.8669 FTU [15:13:11] allencollins leaves the room [15:14:44] And FYI, we are juggling another logistical challenge: we will be speaking live with the President's Office of Science and Technology. [15:15:24] That will be 12:30 to 2:00 and all dive operations will continue during that period. [15:16:31] LAT : 30.222952 , LON : -76.224893 , DEPTH : 2955.5292 m, TEMP : 2.70155 C, SAL : 34.92101 PSU, DO : 8.29151 mg/l, TURBIDITY : 0.8669 FTU [15:20:07] @Allen: during that time should we stay off the phone? [15:20:46] No please dont abandon me! i will be directing the dive as normal.... [15:20:49] emilycrum leaves the room [15:20:55] The interview stuff will be spearate [15:21:00] Haha! Understood! [15:21:32] LAT : 30.222783 , LON : -76.224909 , DEPTH : 2974.2203 m, TEMP : 2.66171 C, SAL : 34.91878 PSU, DO : 8.30156 mg/l, TURBIDITY : 0.873 FTU [15:21:40] Fancy! some PIs figure coordinating a dive and livestream is enough work - not many opt to include a live talk with OST :-) [15:22:28] Not sure whose idea it was. . . Hopefully all tech works, and there is something fun to look at on these walls! [15:22:47] you all are going to be stuck with me while allen et al talk via skype to the fancy people [15:24:00] Are you saying that we are not fancy people...? [15:24:03] that's when we are going to find the benthic ctenophores and other jellies !! [15:24:29] yes @Scott... that is exactly what i am saying! ;-P [15:24:43] :-) [15:26:32] LAT : 30.223074 , LON : -76.225324 , DEPTH : 2974.3957 m, TEMP : 2.66697 C, SAL : 34.91844 PSU, DO : 8.28399 mg/l, TURBIDITY : 0.8669 FTU [15:26:58] carolynruppel leaves the room [15:27:32] jasonchaytor leaves the room [15:30:25] UPDATE: Going to the lip of canyon. Currents too much [15:31:08] Cursed currents. They give [anomalous abundances!] and they take away [our ability to safely see anomalous abundances!] [15:31:21] emilycrum leaves the room [15:31:33] LAT : 30.222856 , LON : -76.225353 , DEPTH : 2974.0411 m, TEMP : 2.67722 C, SAL : 34.91882 PSU, DO : 8.31964 mg/l, TURBIDITY : 0.8669 FTU [15:32:04] sediment dive! [15:32:10] Too soon? [15:32:27] Yes, too soon. But it did make me laugh out loud. [15:33:24] KevinRademacher leaves the room [15:33:29] allencollins leaves the room [15:36:33] LAT : 30.22323 , LON : -76.225353 , DEPTH : 3068.6417 m, TEMP : 2.68101 C, SAL : 34.91853 PSU, DO : 8.33073 mg/l, TURBIDITY : 0.8608 FTU [15:38:45] stephaniefarrington leaves the room [15:41:27] carolynruppel leaves the room: Replaced by new connection [15:41:33] LAT : 30.223866 , LON : -76.225755 , DEPTH : 3173.0228 m, TEMP : 2.69267 C, SAL : 34.91885 PSU, DO : 8.2812 mg/l, TURBIDITY : 0.873 FTU [15:42:05] Actually, finding some flat bottom, still down off the lip some. Hopefully soon. [15:45:08] So close, 25 m off bottom [15:46:08] jasonchaytor leaves the room [15:46:34] LAT : 30.223897 , LON : -76.22603 , DEPTH : 3206.349 m, TEMP : 2.699 C, SAL : 34.91877 PSU, DO : 8.26472 mg/l, TURBIDITY : 0.8547 FTU [15:51:34] LAT : 30.224347 , LON : -76.226057 , DEPTH : 3209.5998 m, TEMP : 2.7016 C, SAL : 34.91941 PSU, DO : 8.2835 mg/l, TURBIDITY : 0.8669 FTU [15:55:21] emilycrum leaves the room [15:56:35] LAT : 30.223973 , LON : -76.226217 , DEPTH : 3209.5199 m, TEMP : 2.7063 C, SAL : 34.91947 PSU, DO : 8.27275 mg/l, TURBIDITY : 0.8669 FTU [16:01:35] LAT : 30.223977 , LON : -76.226369 , DEPTH : 3211.8905 m, TEMP : 2.71965 C, SAL : 34.91998 PSU, DO : 8.33167 mg/l, TURBIDITY : 0.8547 FTU [16:05:11] tabithapearman leaves the room [16:05:40] Stephanie and I had some dives like that on the shelf edge MPAs- just 20 m above bottom in a ripping current and just can't get there. Very frustrating. [16:06:35] LAT : 30.224523 , LON : -76.227152 , DEPTH : 3220.5008 m, TEMP : 2.72655 C, SAL : 34.91961 PSU, DO : 8.27864 mg/l, TURBIDITY : 0.8547 FTU [16:06:54] absolutely frustrating... I think going to sea has taught me a lot of patience! [16:07:29] Real struggle for the Pilots. Sorry for the delay [16:07:34] The ROVs can struggle with the current in Whittard Canyon too :) [16:08:04] Better to be safe so thta we can continue to dive tomorrow and next week, etc, than to risk a serious accident. [16:08:40] But, that said, now I'm even more convinced it is a hidden wonderland just outside our grasp! :-) [16:08:43] Word. [16:09:05] why we should do more midwater dives ;-) [16:09:18] For sure! I guess it really demonstrates why canyons are sometimes less studies as its just so hard to get cameras into them! :) [16:09:53] @George: good one! :-) [16:10:08] Just what I was thinking Tabitha. No wonder no one has been here. [16:11:35] LAT : 30.224638 , LON : -76.226856 , DEPTH : 3281.4338 m, TEMP : 2.69781 C, SAL : 34.92034 PSU, DO : 8.2938 mg/l, TURBIDITY : 0.8791 FTU [16:14:20] I was in the MIR once when the current got hold of us. Target depth was 3000 m. We finally acquired bottom at 4500 m. [16:15:38] @Mike: good thing it is rated to 6000 m! [16:15:49] just what I was thinking! [16:16:35] LAT : 30.224889 , LON : -76.226797 , DEPTH : 3339.2456 m, TEMP : 2.57816 C, SAL : 34.91495 PSU, DO : 8.26601 mg/l, TURBIDITY : 0.8791 FTU [16:16:56] another adventure [16:17:44] I'm think Chris is not going to be very receptive to my future suggestions to visit the scarp wall! [16:17:52] *thinking [16:19:04] I think we're going to have some gnarly weather coming in tonight, I highly doubt we will attempt wall dive in it. [16:19:11] *wall dive [16:20:22] @Stephanie: yes, I was poking fun at myself. [16:21:36] LAT : 30.224883 , LON : -76.226598 , DEPTH : 3325.2376 m, TEMP : 2.61522 C, SAL : 34.91405 PSU, DO : 8.24687 mg/l, TURBIDITY : 0.8852 FTU [16:25:01] johnreed leaves the room [16:25:36] ok they have made 4 attempts to acquire are wall, they are going to try again [16:26:37] LAT : 30.224877 , LON : -76.226842 , DEPTH : 3285.0671 m, TEMP : 2.67959 C, SAL : 34.91732 PSU, DO : 8.24937 mg/l, TURBIDITY : 0.873 FTU [16:28:32] Steph- what is the current direction, down the wall, up the wall or along the wall? and what speed? [16:29:32] jasonchaytor leaves the room [16:30:21] emilycrum leaves the room [16:31:02] they were saying its like 2-3 kts off the bottom, we havent gotten close enough to the wall to see if it drops enough. The ROV is 500 m from the ship so its difficult to adjust. I dont know what direction the current is on. let me see if i can find the right screen [16:31:21] allencollins leaves the room [16:31:37] LAT : 30.224894 , LON : -76.227077 , DEPTH : 3201.8934 m, TEMP : 2.70121 C, SAL : 34.91896 PSU, DO : 8.24798 mg/l, TURBIDITY : 0.8669 FTU [16:33:41] The only screen i can pull up on my own is showing 90o from the west at 0.7 kts. I think that is the surface though. once they get down past the wall, thats where it started ripping! [16:36:05] funnellimg down the canyon [16:36:38] LAT : 30.224647 , LON : -76.227188 , DEPTH : 3204.6624 m, TEMP : 2.69878 C, SAL : 34.91853 PSU, DO : 8.34027 mg/l, TURBIDITY : 0.8669 FTU [16:37:38] jasonchaytor leaves the room [16:39:03] carolynruppel leaves the room [16:40:52] andreaquattrini leaves the room [16:41:39] LAT : 30.224458 , LON : -76.227248 , DEPTH : 3206.9414 m, TEMP : 2.699 C, SAL : 34.9182 PSU, DO : 8.26204 mg/l, TURBIDITY : 0.8669 FTU [16:42:50] stephanie--yes, i think that's the surface current, which is why the ship wanted to move to 270 pointing into it a little while ago [16:43:08] johnreed leaves the room [16:44:42] carolynruppel leaves the room: Replaced by new connection [16:46:39] LAT : 30.224149 , LON : -76.227353 , DEPTH : 3205.936 m, TEMP : 2.70924 C, SAL : 34.9208 PSU, DO : 8.25449 mg/l, TURBIDITY : 0.873 FTU [16:51:12] stephaniefarrington leaves the room [16:51:40] LAT : 30.223989 , LON : -76.227231 , DEPTH : 3206.4211 m, TEMP : 2.7093 C, SAL : 34.91915 PSU, DO : 8.27113 mg/l, TURBIDITY : 0.8791 FTU [16:52:49] tabithapearman leaves the room [16:56:37] Recall yesterday on the dive planning call how I said I loved to target the "nose" of ridges and canyons because they should accelerate currents... This is perhaps a bit too much acceleration! [16:56:42] LAT : 30.224047 , LON : -76.227036 , DEPTH : 3189.4769 m, TEMP : 2.69402 C, SAL : 34.91927 PSU, DO : 8.324 mg/l, TURBIDITY : 0.8852 FTU [17:01:40] LAT : 30.224003 , LON : -76.227038 , DEPTH : 3188.0994 m, TEMP : 2.70013 C, SAL : 34.91934 PSU, DO : 8.30669 mg/l, TURBIDITY : 0.8608 FTU [17:06:30] Getting close to the wall, but moving slowly out of caution due to the strong near bottom currents. Should see bottom soon, though. [17:06:41] LAT : 30.223747 , LON : -76.226846 , DEPTH : 3187.2475 m, TEMP : 2.71145 C, SAL : 34.91968 PSU, DO : 8.23804 mg/l, TURBIDITY : 0.8669 FTU [17:07:09] iscwatch leaves the room: Replaced by new connection [17:07:30] jasonchaytor leaves the room [17:11:41] LAT : 30.223925 , LON : -76.226575 , DEPTH : 3188.1905 m, TEMP : 2.71416 C, SAL : 34.91961 PSU, DO : 8.24321 mg/l, TURBIDITY : 0.8669 FTU [17:15:02] carolynruppel leaves the room [17:16:07] georgematsumoto leaves the room [17:16:21] Dear Steph et al: I have been hearing through camera 3. It is incredible that what seems so easy and we take for granted, needs the art and experience. Go for it pilots, dont stress exagerately. Thanks [17:16:41] LAT : 30.224029 , LON : -76.226046 , DEPTH : 3193.9912 m, TEMP : 2.69125 C, SAL : 34.91865 PSU, DO : 8.17402 mg/l, TURBIDITY : 0.8669 FTU [17:18:05] @mariadiaz...and they have been at it for a long time and just keep trying again and following each procedure and doing all their checks...it is indeed mind-boggling how hard they are trying [17:18:12] carolynruppel leaves the room: Replaced by new connection [17:18:38] The ROV crew are so talented that we usually take everything for granted without realizing how much work and effort is going on behind the scenes. [17:21:42] LAT : 30.22377 , LON : -76.226128 , DEPTH : 3208.9927 m, TEMP : 2.69419 C, SAL : 34.91875 PSU, DO : 8.21138 mg/l, TURBIDITY : 0.8669 FTU [17:22:17] johnreed leaves the room [17:23:11] mariadiaz leaves the room [17:25:33] corrected link fr Allen's presentation: https://www.youtube.com/watch?v=-5jMrimca8U [17:26:42] LAT : 30.223578 , LON : -76.226297 , DEPTH : 3198.35 m, TEMP : 2.67807 C, SAL : 34.91827 PSU, DO : 8.25326 mg/l, TURBIDITY : 0.873 FTU [17:29:59] johnreed leaves the room [17:30:32] bottom in sight [17:30:53] found it! [17:30:59] kudos to the pilots...that was an incredible 2 hours [17:31:10] What a surprise: a sediment-free hard bottom! ;-) [17:31:43] LAT : 30.223441 , LON : -76.225615 , DEPTH : 3210.973 m, TEMP : 2.71054 C, SAL : 34.91873 PSU, DO : 8.30075 mg/l, TURBIDITY : 0.8608 FTU [17:32:15] GO PILOTS!! GO ALLEN AND STEPH!!! [17:32:28] ferro-manganese coating that accumulates very slowly on the rock surfaces [17:32:34] SO MANY LITTLE SPONGES [17:32:40] hello all! [17:33:04] Geodiid sponges are known to be down at this depth. But this is the lower extent. [17:33:16] we have to looks they can be Tetillids, Geodia sp [17:33:25] Hello everyone! [17:33:32] Hello! [17:33:42] EX2107_DIVE07 ROV on Bottom [17:34:00] Where are we on the wall? How far from the top edge? [17:34:05] How deep are we? [17:34:18] 3208.584 m [17:34:28] At 3 pm a Nodastrella vase [17:35:36] I think the top of the plateau here is at about 2960 m, so we are about 200 m below that lip. Very gross estimate. [17:36:10] I feel like the dead hexactinellids could have been Chonellasma. [17:36:43] LAT : 30.223234 , LON : -76.225577 , DEPTH : 3209.413 m, TEMP : 2.69284 C, SAL : 34.91969 PSU, DO : 8.21339 mg/l, TURBIDITY : 0.873 FTU [17:39:05] Anthomastus type [17:39:09] Anthomastusu? [17:39:21] emilycrum leaves the room [17:39:32] Yes, these rocks are much more "grungy"...probably have been exposed a lot longer [17:39:48] Just to say, these are not volcanic rocks. They are carbonates that have a Fe-Mn coating on them [17:40:25] thats I would like to ask volcanic or just Mn coating. Thank you Carolyn [17:40:42] I learned it was pronounced as "Connell-asma" by Chris Kelley [17:41:27] they are not volcanic....They are carbonates. The "pocky" appearance can be due to impurities during formation and differential erosion or being exposed longer [17:41:34] Hooray for sponge day! [17:41:44] LAT : 30.223184 , LON : -76.225386 , DEPTH : 3198.2463 m, TEMP : 2.68729 C, SAL : 34.91786 PSU, DO : 8.2331 mg/l, TURBIDITY : 0.8791 FTU [17:42:02] That looked like live Chonelasma [17:42:32] These are carbonate platform deposits (limestone, marls, etc.), most likely of early to mid-Cretaceous age [17:42:39] For context, camera 2 shows a good view of D2 on the wall. [17:43:00] @Allen Great job on the live stream! Listening to both! [17:43:16] To follow on Jason's comment: This makes these among the oldest rocks exposed along the US Atlantic margin [17:43:25] Thanks Nolan. Hope I did not fumble too much. [17:43:47] @Allen you did great! [17:43:59] @Allen Not at all! Y'all did excellent! [17:44:11] could someone tell Stephanie that we are putting the actual geology explanations in the chat....we should stop saying aloud "volcanic" [17:44:13] yeah.. it seems Phakellia [17:44:34] Oh wow, I agree with Phakellia on those stalked fans. [17:44:47] Thanks. Needed that Scott. [17:44:52] Thanks Scott! Adn Jason contributed the carbonate platform [17:45:45] mariadiaz leaves the room [17:46:00] @Chris M Seastar! [17:46:04] oooo! Pteraster or somesuch starfish! [17:46:45] LAT : 30.223046 , LON : -76.225368 , DEPTH : 3190.4875 m, TEMP : 2.69419 C, SAL : 34.91887 PSU, DO : 8.17616 mg/l, TURBIDITY : 0.8608 FTU [17:46:49] front of that sponge cluster to the rgith [17:46:50] So, with sponge expert aboard, the question arises: With a really old, slow-growing sponge with no evidence of physical damage - what causes its death??? [17:47:33] Munidopsidae squat lobster [17:47:40] Disease? [17:48:36] Live Chonelasma for sure! Its a Euritidae [17:48:49] stephaniefarrington leaves the room [17:49:13] @allen on the right.. the sponge tower.. to the left is a starfish [17:49:28] @Ken One way is definitely infection or overabundance of microbes. While a lot of bacteria normally would be mutualists can be opportunisitcally pathogenic. Many of the sponges or their microbiomes produce chemistry to control this microbial growth. [17:49:47] Yes, what the h!!! This is beautiful [17:50:30] That is probably related either to budding Scott [17:51:25] Maybe later on, I am proposing a collection of the lines of cloud sponges as they are a dominant species and we don't know what they are. Other thoughts? [17:51:29] @Maria: thanks for that. [17:51:46] LAT : 30.223052 , LON : -76.225562 , DEPTH : 3191.4891 m, TEMP : 2.69346 C, SAL : 34.91866 PSU, DO : 8.2064 mg/l, TURBIDITY : 0.873 FTU [17:51:53] AaronMicallef leaves the room [17:51:55] I have not seen yet the fan [17:52:23] KevinRademacher leaves the room [17:52:38] @scott, What a wonderful view [17:52:53] it might be their own way of moving [17:53:15] Not Poliopogon... [17:53:30] Not much for a predatory squat lobster to feed on here. As noted, squat lobsters often perch atop structure with pincers extended. They are actually quite adept and snatching onto midwater fishes that visit the benthic boundary layer intermittently. [17:53:48] Not even the larger family of Pheronematidae... [17:54:02] A Geodia on the left and I am not sure if a Hexactinellid on the right (huge Thick kinf og flabellate) [17:54:12] I don't think so, Nolan... it looks more like a demosponge (the white big one) [17:55:05] @Christina I was saying NOT Pheronematidae. They have characteristic fluffy base attachment. That sponge we saw did not. [17:55:24] got it.. :) [17:56:00] @Ken There are at least three ways that microbes can kill a sponge that I can think of. 1) Viral Infection, 2) Opportunistic pathogens clog up the sponge and suffocating it, 3) Microbes produce allelopathic chemicals to kill the sponge host. [17:56:23] coming up on the starfish again! [17:56:46] LAT : 30.223074 , LON : -76.225421 , DEPTH : 3190.7976 m, TEMP : 2.7011 C, SAL : 34.91927 PSU, DO : 8.24497 mg/l, TURBIDITY : 0.8791 FTU [17:56:58] @Christina Yup! Not problem! I am stumped on these demosponges. This is really deep. [17:59:36] same here... It would be great if you can collect one of them, guys [17:59:45] mariadiaz leaves the room [17:59:46] stephaniefarrington leaves the room [18:01:16] Serios is bouncing around, preventing collection for now. But don't be shy to request [18:01:31] Nolan. Thanks - seems maladaptive however for a microbe to kill its host via allelopathy, unless inadvertent. I can realize allelopathy to kill off competing microbes and incidentally harming the sponge. [18:01:47] LAT : 30.223172 , LON : -76.225522 , DEPTH : 3190.3148 m, TEMP : 2.70851 C, SAL : 34.91965 PSU, DO : 8.15816 mg/l, TURBIDITY : 0.8608 FTU [18:04:56] johnreed leaves the room [18:06:47] LAT : 30.223051 , LON : -76.225133 , DEPTH : 3186.4726 m, TEMP : 2.68667 C, SAL : 34.91733 PSU, DO : 8.23674 mg/l, TURBIDITY : 0.8608 FTU [18:07:12] Pink sponge please collect next time but I don't think its Hertwigia. I am leaning towards demosponge. [18:07:28] Very nifty to see that the squat lobster species here is actively grazing. A big contrast to species from shallow depths that perch absolutely immobile, pincers poised, awaiting nektonic prey [18:08:00] Well, collecting could help a lot with that particular sponge. [18:08:11] christophermah leaves the room [18:08:13] Since you said I can try, Allen... Can we collect it? This is a potential new species and our sample is in fragments. [18:08:35] @Ken I agree with you on both statements. [18:08:52] Quick spicule check yesterday's thin fans were indeed hexacts [18:08:54] @Cristiana @Nolan Hi Cristinana!! Nolan there is Cristina Diaz that here I appear as Maria Diaz and Cristiana Castello Branco, just to clarify! Interesting that you think this is a Demospongeae, definitively not as Astrophirida. The texture reminds me to Hamacantha, or Biemna from deeper water. But this is huge and very commno here [18:09:12] I saw polyp lower out of view of sponge [18:11:26] There is a thick cup-like with a wavy rim, it looks a lot like a Stryphnus, Ancorinidae, Astrophorida, that we saw at 642 m, South Carolina [18:11:48] LAT : 30.223049 , LON : -76.225381 , DEPTH : 3190.557 m, TEMP : 2.68938 C, SAL : 34.9187 PSU, DO : 8.21202 mg/l, TURBIDITY : 0.8852 FTU [18:12:09] Not like Leidermation [18:12:26] jasonchaytor leaves the room [18:12:28] Tes I see one in the middle [18:12:37] @CristinaIDiaz I knew that your screen name was different. We have also met IRL. I got a little distracted and must have mixed up the spelling of your name and @Christiana who I have read some of her papers from. [18:12:53] Where are the echinoderms [18:13:00] *Cristiana [18:13:25] 2Nolan that is it!! [18:13:38] Cristiana and Cristina [18:14:24] When I see you again in real life and then meet Cristiana for the first time, I won't be confused! [18:14:47] emilycrum leaves the room [18:15:04] Cris and Cris. Two of my favorite people!!! [18:15:04] stephaniefarrington leaves the room [18:15:08] hahahaha... no prob at all. An we go by Cris (right, Cris)? ^^ [18:15:10] If we could collect that sponge that seems to be budding on a line along the top of the rock that is very neat [18:15:45] @thank you Allen, we are both really cool and we are passionate about sponges!!!!! [18:16:39] what is that octocoral colony in front of us [18:16:40] Kind of thick fans, some Pachastrellid genus [18:16:42] ? [18:16:49] LAT : 30.222911 , LON : -76.225506 , DEPTH : 3197.8554 m, TEMP : 2.68084 C, SAL : 34.91763 PSU, DO : 8.14416 mg/l, TURBIDITY : 0.9096 FTU [18:17:16] bubblegum paragorgid [18:17:33] @Steph are you making transects here? [18:17:42] @Cris, @Cris, and @Allen We sponge people are in a majority! Usually its the coral people! Please say hello to Shirley Pomponi next time you see her! [18:18:08] @Allen I mean previous white colony. not this pink paragorgiid. but might be the same [18:18:37] Sorry Asako for misunderstanding. Tough to keep up! [18:19:16] hey we saw white one again before zoanthid [18:19:20] Very odd submarine landscape. Rock and prolific sponges. Only notable mobile megafauna the occasional white squat lobster. No mobile nektonic megafauna at all - no fish, squid, shrimp, or even jellyfish. [18:19:39] @Allen To clarify some of the audio. It will be a challenge to collect specimens by claw today, is that correct? [18:20:21] that one! after anthomastus. [18:20:37] is that also Paragorgiid? no zoom [18:20:41] Yes, challenge to collect anything. Claw or suction. Teh tethered ROV pulls this one off or away [18:21:27] @Allen Gotcha, that is too bad. Thanks for the update! [18:21:49] LAT : 30.222887 , LON : -76.225709 , DEPTH : 3202.7626 m, TEMP : 2.70421 C, SAL : 34.92024 PSU, DO : 8.21035 mg/l, TURBIDITY : 0.8913 FTU [18:23:04] Colonial tunicate? [18:23:51] Thank you for the zoom for the gorgonians. it must be the same Paragorgia. [18:24:09] @Steph and @ Allen. Paco is watching and the round large round sponge with the large oscule on top highly probable is Geodia pachydermata [18:24:55] Yes stephany the clean large [18:25:07] johnreed leaves the room [18:25:11] That you made a good close up [18:25:34] kensulak leaves the room [18:26:50] LAT : 30.222787 , LON : -76.225467 , DEPTH : 3197.3415 m, TEMP : 2.68339 C, SAL : 34.91916 PSU, DO : 8.23095 mg/l, TURBIDITY : 0.8791 FTU [18:29:00] allencollins leaves the room [18:29:40] Anthomastus type just passed... [18:30:54] mariadiaz leaves the room [18:31:22] emilycrum leaves the room [18:31:51] LAT : 30.222709 , LON : -76.225441 , DEPTH : 3191.3538 m, TEMP : 2.68746 C, SAL : 34.9183 PSU, DO : 8.21951 mg/l, TURBIDITY : 0.873 FTU [18:31:59] There are different strategies [18:32:02] It is possible that the black coral was a "young" colony of Telopathes. [18:32:31] There are few calculations on the literature. But deep water sponges, are slow growers [18:33:01] What are these dead Hex plates Crisina.? All the large ones are dead. Never have seen that before. [18:33:28] Chonelasma I think is the dead sponge, large [18:34:29] @ Stephany, for example the rock sponges (Sclerosponges) grow 0.1 mm per year, and leave yearly marks, and some of the specimens are calculated to be several thousand years, thenth of thousands sometimes [18:34:44] Do we know if there was or if there is a way to tell if an oxygen minimum event happened here? The DO is at 8 which is just fine. But I can't think of something that would kill a bunch of inverts and also drive out the vertebrates. Then the oxygen went back up and the inverts recolonized? Just stream of conscious. [18:35:26] @Allen Kind of reminded me of the weird shallow water colonial stalked tunicates. [18:35:47] stephaniefarrington leaves the room [18:35:54] There have definitely been oxygen minimum events in the north Atlantic. Don't know of the extent southward [18:36:51] LAT : 30.222855 , LON : -76.225257 , DEPTH : 3186.2783 m, TEMP : 2.69951 C, SAL : 34.91905 PSU, DO : 8.27503 mg/l, TURBIDITY : 0.8669 FTU [18:37:04] My prediction is that corals will be abundant at the upper lip onto the plateau where the bottom is more stable (less rubble). You all won't be able to falsify my hypothesis today! [18:37:13] X. muta, has been called Red wood of the sea. Also by calculations from Pawlik's lab they can be over 2k years old. On the mangroves there are sponges that just live few months, others one year, othere several years. But if they produce buds, then the genet can live forever!! [18:37:55] genets living a long time. . . story of the medusozoan polyps as well. [18:38:42] @Allen Could you see if the amorphous glass sponge next to the two clustered round ones had a sieve plate? I couldn't tell. If so, it could have been a weird Euplectellidae. [18:39:52] I don't think there was a sieve plate, but not a clear picture in my mind at this time [18:40:12] @ Allen and Steph from a meessage of Paco Cardenas "these Geodia sponge grounds are beautiful! There are several species of Geodia for sure, but one of the most common seems to be G. pachydermata. It’s also very abundant in the mesophytic zone off Florida. I think the totally clean Geodia-like are not Geodia, they might be some Petrosia [18:40:37] He is making dinner for his children so he can not call right now [18:40:49] EX2107_DIVE07 ROV Ascending [18:41:18] Wonderful dive- Thank you ROV team for your perserverance to get us here. [18:41:27] Thank you for the great dive! I love going super deep like this! [18:41:30] carolynruppel leaves the room [18:41:41] upasanaganguly leaves the room [18:41:43] allencollins leaves the room [18:41:52] LAT : 30.222994 , LON : -76.225565 , DEPTH : 3185.1124 m, TEMP : 2.68842 C, SAL : 34.91854 PSU, DO : 8.20462 mg/l, TURBIDITY : 0.9035 FTU [18:42:10] Thank you very much for such a valuable dive!!! see you tomorrow! [18:42:22] asakomatsumoto leaves the room [18:43:04] Thanks really incrible!!!! See you tomorrow. [18:43:07] Hard fought observations today! [18:43:11] On th e sink hole [18:43:28] Also probably Petrosids!!!!! [18:43:49] YES CONGRATULATION TO THE PILOTS!!! [18:44:01] Thanks for all the fun chatter. Keep it up! [18:44:29] mariadiaz leaves the room [18:45:56] NolanBarrett leaves the room [18:46:34] cristianacastellobranco leaves the room [18:46:47] stephaniefarrington leaves the room [18:46:53] LAT : 30.223087 , LON : -76.225744 , DEPTH : 3112.3716 m, TEMP : 2.67241 C, SAL : 34.9183 PSU, DO : 8.24653 mg/l, TURBIDITY : 0.8852 FTU [18:47:02] allencollins leaves the room [18:48:21] emilycrum leaves the room [18:50:02] michaelvecchione leaves the room [18:51:53] LAT : 30.223303 , LON : -76.225848 , DEPTH : 3018.0696 m, TEMP : 2.66743 C, SAL : 34.91842 PSU, DO : 8.26747 mg/l, TURBIDITY : 0.873 FTU [18:52:56] johnreed leaves the room [18:53:51] cindyvandover leaves the room [18:56:54] LAT : 30.223268 , LON : -76.225454 , DEPTH : 2887.0212 m, TEMP : 2.67343 C, SAL : 34.91843 PSU, DO : 8.25991 mg/l, TURBIDITY : 0.8669 FTU [19:01:18] johnreed leaves the room [19:01:21] scottfrance leaves the room [19:01:24] christophermah leaves the room [19:01:56] LAT : 30.222736 , LON : -76.224755 , DEPTH : 2749.215 m, TEMP : 2.98682 C, SAL : 34.93315 PSU, DO : 8.13008 mg/l, TURBIDITY : 0.8669 FTU [19:06:56] LAT : 30.2225 , LON : -76.224966 , DEPTH : 2598.0194 m, TEMP : 2.97572 C, SAL : 34.93318 PSU, DO : 8.13096 mg/l, TURBIDITY : 0.8669 FTU [19:11:56] LAT : 30.22261 , LON : -76.225114 , DEPTH : 2457.2673 m, TEMP : 3.05785 C, SAL : 34.93736 PSU, DO : 8.25367 mg/l, TURBIDITY : 0.8669 FTU [19:16:57] LAT : 30.222973 , LON : -76.22518 , DEPTH : 2305.0176 m, TEMP : 3.14807 C, SAL : 34.9416 PSU, DO : 8.20585 mg/l, TURBIDITY : 0.8852 FTU [19:21:58] LAT : 30.223032 , LON : -76.225344 , DEPTH : 2156.5489 m, TEMP : 3.40012 C, SAL : 34.95104 PSU, DO : 8.21633 mg/l, TURBIDITY : 0.873 FTU [19:24:31] stevenauscavitch leaves the room [19:26:58] LAT : 30.222954 , LON : -76.225591 , DEPTH : 2005.0899 m, TEMP : 3.59586 C, SAL : 34.96082 PSU, DO : 8.19166 mg/l, TURBIDITY : 0.8669 FTU [19:31:59] LAT : 30.222948 , LON : -76.22597 , DEPTH : 1856.2355 m, TEMP : 3.79367 C, SAL : 34.9727 PSU, DO : 8.12728 mg/l, TURBIDITY : 0.8608 FTU [19:36:59] LAT : 30.223088 , LON : -76.226259 , DEPTH : 1704.4707 m, TEMP : 3.92609 C, SAL : 34.97293 PSU, DO : 8.17718 mg/l, TURBIDITY : 0.873 FTU [19:42:00] LAT : 30.223255 , LON : -76.226424 , DEPTH : 1554.3521 m, TEMP : 4.1565 C, SAL : 34.98568 PSU, DO : 8.09991 mg/l, TURBIDITY : 0.8669 FTU [19:47:01] LAT : 30.223365 , LON : -76.226568 , DEPTH : 1398.531 m, TEMP : 4.41901 C, SAL : 34.99929 PSU, DO : 8.02177 mg/l, TURBIDITY : 0.8791 FTU [19:52:02] LAT : 30.223405 , LON : -76.226655 , DEPTH : 1243.0611 m, TEMP : 4.72397 C, SAL : 35.01713 PSU, DO : 7.82732 mg/l, TURBIDITY : 0.8852 FTU [19:57:02] LAT : 30.223404 , LON : -76.226811 , DEPTH : 1090.1638 m, TEMP : 5.9518 C, SAL : 35.0956 PSU, DO : 6.81708 mg/l, TURBIDITY : 0.8791 FTU [20:02:03] LAT : 30.223536 , LON : -76.226963 , DEPTH : 933.6935 m, TEMP : 7.59742 C, SAL : 35.13593 PSU, DO : 5.63772 mg/l, TURBIDITY : 0.8913 FTU [20:07:04] LAT : 30.223799 , LON : -76.227051 , DEPTH : 784.3649 m, TEMP : 11.08807 C, SAL : 35.42413 PSU, DO : 4.67223 mg/l, TURBIDITY : 0.8913 FTU [20:08:53] stephaniefarrington leaves the room [20:08:53] chat-admin leaves the room [20:12:04] LAT : 30.224371 , LON : -76.227536 , DEPTH : 636.772 m, TEMP : 14.53356 C, SAL : 35.91511 PSU, DO : 5.33727 mg/l, TURBIDITY : 0.8913 FTU [20:17:04] LAT : 30.22493 , LON : -76.228114 , DEPTH : 484.1642 m, TEMP : 17.39153 C, SAL : 36.38733 PSU, DO : 5.87321 mg/l, TURBIDITY : 0.8913 FTU [20:22:05] LAT : 30.225465 , LON : -76.228716 , DEPTH : 337.377 m, TEMP : 18.83576 C, SAL : 36.63883 PSU, DO : 6.6484 mg/l, TURBIDITY : 0.8852 FTU [20:27:05] LAT : 30.226002 , LON : -76.229298 , DEPTH : 191.4401 m, TEMP : 19.38793 C, SAL : 36.69046 PSU, DO : 6.64109 mg/l, TURBIDITY : 0.8547 FTU [20:32:06] LAT : 30.226558 , LON : -76.229962 , DEPTH : 55.7596 m, TEMP : 25.20845 C, SAL : 36.65901 PSU, DO : 6.93802 mg/l, TURBIDITY : 0.8181 FTU [20:34:35] chat-admin leaves the room [20:37:06] LAT : 30.227088 , LON : -76.230299 , DEPTH : 56.1306 m, TEMP : 25.21245 C, SAL : 36.65766 PSU, DO : 6.96658 mg/l, TURBIDITY : 0.7998 FTU [20:42:06] LAT : 30.227489 , LON : -76.229561 , DEPTH : 28.2448 m, TEMP : 25.88679 C, SAL : 36.56685 PSU, DO : 6.71555 mg/l, TURBIDITY : 0.7814 FTU [20:43:42] EX2107_DIVE07 ROV on Surface [20:59:21] EX2107_DIVE07 ROV Recovery Complete [22:16:26] chat-admin leaves the room [22:21:24] okexnav leaves the room [23:00:48] EX2107_DIVE07 ROV powered off