Dive R500  
      Dive Plan: Continuation of aborted Dive 499. Changed Niskin and a piston sampler on HFS (P4).  
      Note: Nav fixes not edited in the logs. All fixes were logged, regardless of accuracy. Use the dive plots to determine actual positions.  
  UTC Hour Min Depth (m) Sub Hdng (deg) UTM X UTM Y Comments Frmgrbs, Photos, Samples
23 15 5 303 423705 5088548 Dive went in at 23:14.  
0 32 1526 155 423736 5088471 On bottom. Old Worms 98 m bearing 10.  
0 33 1526 107 423714 5088298 Complete sediment covering.  
0 34 1525 154 423836 5088124 Sediment covering thinning out, . Many sponges on rocks. Photo 20 - 21
0 35 1523 148 423779 5088458 Photo 23 coming into venting, worms seen Staining, on the

western edge of where we were.

 Photo 23
0 36 1524 126 423779 5088458 collapse pit with drain back and worms. If there is visible venting, we will take it.  
0 38 1523 222 423790 5088423 Photo 24 of hole with tube worms Photo 24 - 25
0 38 1525 249 423790 5088418 better site at Old Worms R500-1
0 38 1525 237 423790 5088418 Many tube worms at old worms Photo 26
0 39 1526 215 423830 5087842 AT old worms quite a bit of visible flow. R500-2
0 40 1525 239 423786 5088415 Preparing for sampling. To 8.2 degrees so far. R500-3
0 42 1526 234 423786 5088416 Getting temperatures to 9 degrees as we are poking under a worm clump.  
0 44 1526 230 423655 5088559 Sampler locked in T1=9.5, T2=7.5.  
0 45 1526 228 423786 5088414 HFS temp probe placed under a skirt of tube worms. flows are reminiscent of cloud Mkr-N6 ; very isothermal R500-4
0 45 1526 229 423786 5088414 Bag 9 is being used to sample this site. The fixes are good.  
0 47 1526 224 423769 5088326 Sample bag 9 started at 0047 HFS-9_dfl

_R500-1
0 50 1526 222 424020 5088693 Baby palm worms on tube worms during sampling of HFS bag 4 R500-5
0 52 1526 223 423784 5088414 Bag 9 stopped, maximum temperature 9.6 degrees.  
0 57 1526 223 423785 5088414 Scale worms covered with bacterial mat, palm worms. R500-6
0 58 1526 223 423857 5087947 Starting bag 17 at 0:58 . HFS-17_dfl

_R500-2
0 59 1526 220 423316 5087803 Panning camera around to look at site.  
1 1 1526 220 424019 5088696 Shimmering water coming out of tube, distilled water being

pumped out of sampler

 R500-7
1 2 1526 219 423771 5088327 HFS-17_dfl_R500-2 Tmax=9.8, time stopped at 70 ml, 0105 UTC.  
1 5 1526 222 423567 5088645 Started at 0106. This is a gas piston. HFS-23_dfl

_R500-3
1 7 1526 220 423784 5088414 Stopped piston 23 at 0107.  
1 8 1526 221 423561 5088649 Now changing to suction sampling J3 64 micron mesh  
1 10 1526 222 423741 5088757 Scale worms flying by, preparing for J3 suction sample. R500-8
1 13 1522 172 423704 5088314 Vacating this site to do the suction sampler elsewhere. We did not take the suction sample.  
1 15 1524 132 423758 5088332 Seeing alot of staining (Photo 27). We are moving to an older bush of tube worms at site Old Worms.  
1 17 1525 151 423741 5088504 Tube worm bushes seen but rejected as a sampling site as being too small. Photo 27
1 22 1520 90 423762 5088421 This is a four transponder fix.  
1 23 1522 173 423767 5088426 Heading east of field.  
1 23 1522 182 423730 5088482 back to where we took the fluid sample. Photo 28 - 30 R500-9
1 24 1523 142 423785 5088417 Big bush of tube worms away from fluid sampling site.  
1 25 1525 130 423795 5088395 crab on the right of older tube worm bushes and we will take J3 over this bush. Photo 31
1 26 1526 137 423795 5088395 Slow to medium suction will be required.  
1 27 1526 141 423793 5088414 good fix on this site. Started 0127 for larvae, sampler J3

for 15 minutes.

 SS-j3_dfl

_R500-4
1 39 1526 153 423790 5088411 Stopped at 01:39:45 suction sample J3. We will now reposition for Christian's sample. The elapsed time of sample was 12 minutes.  
1 47 1526 169 423793 5088415 Started 01:47:40, sampling at an old tube worms community 10 micron mesh. SS-j1_bio

_R500-5
1 49 1526 174 423793 5088413 Shaking up the tube worms for biota sampling. R500-10
1 54 1526 175 423795 5088416 Sampling results R500-11
1 56 1526 171 423798 5088391 The suction sampler is being moved side to side, stopped 0156:20  
2 0 1526 175 423790 5088410 Jar 4 was just turned on briefly.  
2 3 1526 174 423791 5088414 Trying to find clams and other fauna for suction sampling.  
2 7 1526 195 423585 5088647 Suction sample. SS-j2_bio

_R500-6
2 8 1527 195 423799 5088412  
 2 10 1520 188 423016 5086805 Lost P-code.  
2 18 1527 232 423804 5088396 Among clam shells.  
2 18 1527 233 423789 5088414 Clam shells at old worms site.  
2 19 1527 231 423792 5088410 ss-j2_bio_R500-6 pump on at 2:20.  
2 28 1527 214 423794 5088409 Sample of J2. R500-12
2 29 1527 214 423791 5088406 Flush of J2. R500-13
2 29 1527 217 423787 5088405 Stopped pumping 02:29 and will look for other fauna.  
2 31 1527 207 423792 5088406 Broken hose on the suction sample. We are now done with suction sampling. Hose got stuck on bracket and broke hose.  
2 36 1527 184 423793 5088406 Heading back to the cage.  
2 48 1477 145 423826 5088507 Heading east to start an Imagenex line.  
3 2 1499 177 423923 5088353 Starting Imagenex line 1.  
4 57 1497 248 424064 5087479 Imagenex line complete and we are now moving over to Mkr-Mkr-N41/FeO2. Tom Corbet was here.  
5 20 1521 127 423887 5087434 On bottom in lobate field covered with yellowish hydrothermal? sediment. Some white bacterial mat on edges of collapse. A good deal of particulate mater in the water column.  
5 23 1520 167 423909 5087421 looking for FeO2 site. Water is very cloudy. Mkr-Mkr-N41 found. MTR in view too. Many white patches of biota between yellow stained/coated low relief pillows.  
5 26 1520 355 423910 5087404 Quite an extensive field of scattered Fe oxides on lobates. Some jumbled too. Photo 32
5 29 1521 166 423913 5087431 Settling down between lobates, looking for venting. Mat of diatoms? all over the tops of lobates. Munch munch munch!  
5 32 1521 281 423919 5087431 Looking for venting site to sample. Seeing a buoyant plume here. Lots of Fe Oxide around.  
5 35 1521 119 423900 5087424 some venting spotted R500-14
5 35 1521 138 423900 5087424 Quite a lot of diffuse venting from in-between lobates. Fe Oxide all over the tops of lobates. Much bacterial floc in cracks between lobes. Regional warm water is above ambient (2.6C).  
5 39 1522 121 423904 5087423 Diffuse flow with Fe oxide and floc between lobate flows. R500-15
5 45 1522 133 423905 5087425 Looking for hotter water up to 5.1 C. in a hole between lobates. Temp up to 5.5C. Fix x=3904 y=7423 NE of FeO2. Taking the fluid sample now.  
5 47 1521 129 423902 5087422 5 m NE of FeO2. Sample is 4.5 C inlet, 4.1 C outlet. sampling. Some worms living in the mucus. There was a small fish before too. Small particles caught in the filter that will be analyzed by XRF and STEM. HFS-19_dfl

_R500-7
5 52 1521 133 423905 5087424 Scale worm on top of lobate, Kim confirms. Also pandora worm in tube down in hollow of venting site.  
5 54 1521 129 423904 5087424 Pandora worm in low T vent but not the site we are sampling. R500-17
5 55 1521 130 423905 5087424 Finished the fluid sampling. Going to take a gas tight here.  
6 3 1521 130 423899 5087438 Can't take a suction sample because the line is broken.  
6 6 1521 130 423900 5087439 Sample gastight #6 Gtb-6_dfl-R500-8
6 10 1518 170 423906 5087430 Taking a zigzag course to get to Nascent vent. Photo 33?
6 11 1520 162 423906 5087424 Heading south over some collapse pits. Very dense plume, seeing Mkr-Mkr-N41now. Photo of iron stained lobates. Photo 34
6 12 1520 178 423893 5087394 more bacterial material and some tubeworms, between most lobates, lots of shimmering water. Stopping to sample in this field Photo 35 - 36
6 14 1521 187 423911 5087385 Many snails and limpets (me thinks) and quite a lot of bags on the lobates. Tubeworms concentrated in more concentrated flow between the lobes. Much diffuse venting.  
6 16 1521 224 423910 5087391 Taking temp. in-between lobes. up in the 5-6C temp range. Halfway between Mkr-Mkr-N41 and Nascent 3911 7391.  
6 19 1521 218 423916 5087399 Higher Temps in the 20 C range. in the midst of a tubeworm clump.  
6 23 1521 221 423905 5087404 Begin sampling R500-18
6 24 1521 219 423912 5087394 Unfiltered bag sample HFS-16-dfl

_R500-9
6 25 1521 218 423910 5087386 sampling location near Mkr-Mkr-N41 R500-19
6 26 1521 221 423910 5087393 more of the same R500-20
6 28 1521 219 423910 5087392 Done with that sample  
6 28 1521 220 423872 5087043 Gas tight sample, gtb-stbd side, sample #7 Gtb-7_dlf

_R500-10
6 36 1521 221 423897 5087366 Searching same spot for higher temp.  
6 43 1521 220 423902 5087402 Probe is back up in same spot with T's in the 20's. Starting to sample bag number 1 with a filter. HFS-1_dfl

_R500-11
6 46 1521 217 423927 5087415 fluid sampling site R50021
6 47 1521 218 423912 5087390 Stopping sample, exit T about 14 C. Now doing filter #10 for lipids. HFS-10_dfl _R500-12
6 55 1521 218 423918 5087403 Still pumping for lipids  
6 59 1521 219 423903 5087396 finished taking sample. Taking filter 13 next. in sample place. HFS-13_dfl _R500-13
7 1 1521 216 423977 5087763 Now it is working, sample #13 being taken now. DNA filter is 13.  
7 5 1521 217 423928 5087451 sampling site for several recent samples (post GTB) R500-22
7 7 1521 218 424278 5087191 photo #37  
7 15 1521 220 423908 5087385 bags and more bags R500-24
7 26 1520 213 423911 5087375 good fix baby  
7 31 1520 280 423907 5087378 deploy MTR  
7 32 1520 274 423909 5087380 MTR 3175, repositioned from R491 at Mkr-Mkr-N41 area. Placed at base of tube worm clump.  
7 33 1520 287 423909 5087380 Checking temp with fluid sampler, Tmax at 15.3 C at business end  
7 38 1520 289 423871 5087743 Moving towards Cloud Mkr-Mkr-N6 next  
7 40 1519 200 423902 5087397     Photo 52
7 41 1519 196 423941 5087467     Photo 53
7 41 1519 193 423941 5087467   Photo 54 - 55
7 43 1518 194 423946 5087466     Photo 56
7 44 1519 182 423946 5087466     Photo 57
7 45 1519 189 423946 5087466     Photo 58
7 47 1520 173 424074 5087661 good fix 23m at 17 degrees heading, temp check at 6.1C Tmax  
7 51 1519 176 423912 5087352 Traversing south from this MTR - coming to the edge of a collapse. Some pockets of white lined venting. Photo-59 - 60
7 51 1519 157 423912 5087352 Alternating orange and white coverage on the lobate lavas. Photo-61
7 52 1520 195 423912 5087352 More lobates with white and orange stuff. Photo-62
7 52 1519 195 423905 5087340 White stains from venting. Photo-63
7 53 1520 171 423957 5087432 More staining. Photo-64
7 54 1519 194 423957 5087432 Large collapsed pit.  
7 54 1519 182 423957 5087432 More staining on these lavas. More orange stuff than before. Photo-65
7 54 1519 194 423937 5087377 Some little tube worms in the pockets. Photo-6
7 55 1519 171 423937 5087377 Some blue protozoan mat  
7 55 1518 183 423937 5087377 More white staining, little tube worms, etc. Photo-67
7 56 1519 199 423918 5087309 Quite a bit of shimmering flow here.  
7 56 1519 173 423917 5087312 good fix here.  
7 57 1520 223 424234 5087126 We're 60 m south of the MTR, we're going to probe the temperature here.  
7 59 1520 229 423881 5087414 Little hole with white shimery stuff flowing out. 3918 7310.  
8 2 1520 228 424674 5087293 Sampling, Temp 7.5C HFS-4_dfl _R500-14
8 8 1520 227 423914 5087301 Stopping sampling  
8 12 1520 243 423915 5087306 Reposition, temp at 9.5C, pump on  
8 17 1520 224 423915 5087300 Done sampling, ~60 cc sampled, Tmax 11.3C  
8 18 1520 222 423914 5087301 Sampling site of HFS04 R500-25
9 12 1523 279 423904 5087110 photo 69 at Mkr-Mkr-N4, Bact Traps in view Photo 69
9 15 1524 248 423902 5087118     Photo 70, 71
9 18 1522 269 423906 5087106     Photo 72, 73
9 19 1523 317 423916 5087114     Photo 74, 75
9 21 1525 335 423917 5087127 Arrive at Mkr-Mkr-N6 Photo 76, 77
9 24 1524 301 423904 5087117 Fluid sampling at cloud Mkr-N6 R50028
9 23 1525 308 423915 5087116 Sample filter 6, temp at 20oC steady. Fish filter HFS-6_dfl _R500-15
9 27 1525 293 423904 5087113 start sampling  
9 28 1525 308 423903 5087116     photo 78
9 36 1526 304 423901 5087112 Done with the sample  
9 36 1526 306 423906 5087112 Starting filter #12, DNA filter HFS-12_dfl _R500-16
9 38 1526 299 423902 5087108 Another view of fluid sampling at Cloud Mkr-N6 R50029
9 46 1525 302 423903 5087118 stopped sampling  
9 47 1525 301 423903 5087117 Lipid filter, starting sample HFS-15_dfl _R500-17
9 56 1524 302 423902 5087116 stopping sample  
9 58 1524 304 423901 5087117 piston #20 started, just another water sample HFS-20_dfl _R500-18
10 4 1524 304 423902 5087115 Stopped sampling with 675 ml  
10 4 1524 306 423908 5087120 evil-nasty-slurpgun-killing-niskin sample #19, in flow of Mkr-N6 vent. Niskin_dfl

_R500-19
10 23 1523 303 423903 5087114     photo 79
10 24 1522 258 423903 5087105     photo 80
10 28 1521 83 423895 5087108     photo 82
10 29 1521 69 423897 5087122 Mkr-N4 Photo 83 - 85
10 29 1521 58 423894 5087109     photo 86
10 31 1521 114 423896 5087119   Photo 88 - 89
10 32 1521 115 423895 5087120 At Mkr-N4 R500-30
10 33 1521 118 423895 5087119 good fix  
10 38 1521 103 423896 5087119 Transacting across cloud vent area  
10 40 1521 289 423898 5087118 Cloud, Mkr-N4 R500-31
10 44 1520 290 423899 5087120 Survey of Mkr-N4 area, heading 285 to the right, drops off and then there is a hole. Heading for Mkr-21. Photo
10 45 1521 65 423900 5087118 Video mapping of Cloud area.  
10 46 1522 272 423901 5087117 Back at Mkr-21. Facing heading 285. Waiting for debris to clear. Range the top of the cliff = 9 meters. Adjusting the color camera to look just above the fluid sampler.  
10 56 1523 282 423904 5087116 Making sure we are getting good fixes. Currently we are stopped and sitting on the bottom.  
11 6 1523 284 423904 5087118 Starting video survey. First a lateral to the east, we are going to mow the grass, in steps of 2 meters east and west.  
11 7 1523 283 423905 5087116 Kim's tape is started. Keep a 285 heading. Begin 21:08  
11 8 1523 286 423904 5087117 Bottom at beginning of survey. photo 92
11 8 1523 287 423902 5087107 edge of basin, up on the wall a little bit. edge large drop of and no more venting. Going back to port. photo 93
11 10 1523 288 423904 5087113 Lateral west. Past the large patch of worms. Another area of venting, big hole with tube worms. Another basin. Another vent. Now we are at the wall. Move up 2 meters. Now back North.  
11 12 1522 284 423905 5087110 Edge on South side, large drop off, coming over the pit. Photo 97 is directly over the Mkr-N4. photo 94 - 98
11 13 1522 289 424007 5087648 On the N side. over a large rock pillar, moving ahead 2 meters. 9 going back to S, still heading 285, Camera is dead. Photos101 and 102 did not flash. photo 99 - 100
11 15 1523 285 423902 5087113 At the south edge. Turning to N to range on the pillars. New VCR tapes at 1:16. Distance to other side (pillars) is 6 meters. Back to 285 heading, stopping ahead 1 meter only. Lateral to the N, 3 meter distance from cliffs on W extremity.  
11 18 1522 286 423905 5087108 Trying camera, broken. Face of W edge, another area of venting. At the corner of W and N edge. Lost the cliff, then we nudged the pillars on the N side. Move to W and do last pass across the lower face of the clif. Still on 285. More venting.  
11 21 1522 282 423899 5087123 Moving down, now lateral to the S, passing the marker, lots of worms.  
11 22 1522 278 423898 5087120 Touching on bottom, back at the big cliffs, at edge coming up, turning N. Heading N. There is venting on a small razorback down below. Moving along the wall, past the pillar, the cliff flattens. This is a new pillar, still going N. lateralling to big wall  
11 27 1520 1 423896 5087120 Lateral to N, another bounding wall, not a continuous wall, moving S,  
11 29 1521 360 423901 5087113 Moving over Mkr-21, setting down on the bottom. Turning to 285, to map a hole that we missed earlier.  
11 30 1522 282 423903 5087111 Heading 285 from a point directly south of Mkr-21. Going out of the edge of the field. Big rock, little rock. Going back to the eastern edge of the field.  
11 33 1522 290 423903 5087116 Heading 285, going over the marker, connecting to the other marker, a short lateral to N. Redoing the same run to fill in the final gaps in coverage.  
11 35 1522 287 423899 5087114 Changed Kim's tape, we are at the eastern edge of the field. Doing a little hop (3 meter) to the south, bottom is split by a U shape.  
11 37 1523 286 423901 5087112 Starting last east to west run. over T-bone steak, straight ahead on 285, on the left is the pillar in the distance, running 250 across the last structure in the SW corner of the field.  
11 40 1518 253 423887 5087110 Small amount of venting on top and then the abyss.  
11 40 1517 316 423885 5087107 Flying along the southern edge, heading 105, break to N, other ridge (that defines the field) on the west.  
11 43 1519 342 423891 5087097 just before we went to the large structure, saw the pillar, need to go back to the pillar. Not far from marker Mkr-N4. We are now back to Mkr-21, moving S and W.  
11 48 1520 234 423898 5087119 Still looking for the pillar.  
11 51 1516 278 424367 5087936 Stopping the tape, heading back to the cage.  
11 53 1488 338 424440 5086672 ROPOS is back to the cage. Checking out the Nav. It is ok. Moving the ship 70 meters to the west.  
12 9 1510 264 423867 5087075 Heading to Mkr-33.  
12 10 1522 261 424087 5087596 Sitting on the bottom. Trying to get a fix.  
12 13 1522 254 423880 5087084 good fixes. Moving bearing 297. Coming into some white staining on the sheet flows.  
12 14 1520 290 423874 5087093 Heading 289, 24 meters to Mkr-33.  
12 15 1521 289 423861 5087103 Another piece of broken sheet. Found Mkr-33. Moving lateral before we stir up the bottom. Short video survey along the crack.  
12 17 1521 211 423853 5087104 Mkr-33 R500-33
12 17 1520 213 423744 5086611 Mkr-33 R500-34
12 16 1521 211 423854 5087098 Heading is 215-212. Looking for areas to get temp measurements. Going back to the area where al the osmo samplers sit to take fluid samples.  
12 18 1522 217 423852 5087103 Siting on the bottom. Extending fluid sampler probe.  
12 19 1522 218 423856 5087104 Moving right next to the spot where the hot water is coming out. Positioning probe.  
12 20 1522 228 423855 5087102 6 deg C on probe, 7 deg. Attempting to find max T.  
12 21 1522 235 423854 5087099 Temp is climbing, 13 deg, 18, 34, 42, 54, 60, 65, 69, 73, 74, now back down to 45. Back up to around 70.  
12 24 1522 238 423855 5087102 Number 1 sample FISH, temp is 76, 12:24 start, filter 1 fish. HFS-1_dfl

_R500-20
12 29 1522 238 423854 5087101 T2 is reading 43 deg C.  
12 33 1522 236 423854 5087100 75.5 max T , stopping sample. Filtered 1 liter.  
12 34 1522 243 423857 5087099 starting filter 2 XRF. HFS-2_dfl

_R500-21
12 38 1522 245 423852 5087085 Max T 7.5, vol 50ml, sample stopped 12:38  
12 39 1522 245 423850 5087103 Start sample. Sterevex. T1 6, T2 43. Panning to outlet line to flow. good flow. HFS-7_dfl

_R500-22
12 56 1522 246 423857 5087098 Stopping sample 75.7 was Max T.  
12 58 1522 246 423474 5086596 starting filter 21 for lipids. HFS-21_dlf _R500-23
13 8 1522 247 423856 5087095 Stopping the sample, Max T 73, 120 ml.  
13 9 1522 247 423978 5087411 Starting piston 2. HFS-2_dfl

_R500-24
13 15 1522 245 423853 5087106 624 ml, 74 max t , stopping.  
13 15 1522 247 423658 5087628 Bag 14 with a filter. starting at 13:16 HFS-14_dfl _R500-25
13 19 1522 245 423859 5087096 Change VCR tapes.  
13 21 1522 245 423856 5087088 stopping at 13:20, T max 73.5 525ml.  
13 21 1522 244 424143 5087726 Removing probe.  
13 25 1522 244 423858 5087090 Mkr-33 R500-35
13 23 1522 244 423858 5087091 Starting temp survey, between where just sampled and bio traps. Max 7.5 was for the sampling. Now start for this area, 15, 20, 25, 30, moving probe to backside, 8, 9,10. Looking SW flow seems be coming out this side of the crack.  
13 29 1522 252 423650 5086840 Mkr-33 slab o' rock R500-36
13 28 1522 243 424217 5086791 Moving to the other side of the osmo samplers. Repositioning ROPOS to the end of the crack. Down on the east end of the block. Positioning probe. Pump on at 13:3. 10, 7, steady at 7, moving slightly to strb.  
13 32        Moving probe along the crack up to back near the osmos as get closer. Return to port end of crack. Most we got around here was 10.3 Pump keeps going off. Up to 13  
13 37 1522 216 423860 5087100 ROPOS is moving down the other side to look for venting from other cracks. Not much is flowing out of this other side. Moving farther away, looking for any venting. Appears to be a little venting from another crack. Setting down.  
13 41 1522 108 423847 5087099 Positioning probe in the crack. Looks like a broken up pavement. Putting probe in small crack. 3, 5, 6 deg so far. Tmax=6.5 C. Removing probe. ROPOS is moving, reprobing another area Tmax=6  
13 45 1522 125 423849 5087100 Time to come up. ROPOS has left the Bottom at 13:46. ROPOS is moving back to cage.  
13 48 1509 67 423862 5087089 Appear to be getting hydraulic oil in the water. Red droplets.  
13 51 1491 260 423862 5087089 Tapes off.  
13 52 1490 249 423890 5087096 ROPOS is back in the cage and starting to head for the surface. Game over.  
       Dive Summary: HFS, suction, gastight and nisken samples were taken at various vents (Old Worms, Old Flow, Nascent, Mkr-33, and Cloud). 25 samples collected in all. Video mapping of Cloud Vent. Imagenex survey at end of dive.