Dive R485 | |||||||
Dive Objectives: Primary objective of the dive is to obtain vent fluids/filtered samples along eruptive line. Dive will begin at Mkr-33 and end at the Milky Vent area. Suction samples will also be done at some of the sites. | |||||||
Elevator will be recovered (weather permitting) sometime during the dive. | |||||||
ROPOS Configuration: Vent Fluid Sampler, Suction Sampler, Gas Tights, Imagenex, and cameras. | |||||||
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 |
ROPOS in the water | |||||||
7 | 6 | 88 | 22 | 424231 | 5087291 | This is the real launch time, the previous entry was wrong. | |
8 | 10 | 1315 | 140 | 423873 | 5087133 | A line got caught in the cage, preventing ROPOS from leaving the cage, and we're going to start back up. | |
8 | 13 | 1239 | 156 | 423853 | 5087110 | Correction. A line connecting the vehicle to the cage on deck was not removed, preventing ROPOS from leaving its cage. We're still coming up. Slight delay. | |
9 | 13 | 1 | 156 | 423814 | 5088795 | ROPOS came back up in order to remove the rope attaching it to the cage. | |
9 | 36 | 0 | 123 | 423814 | 5088795 | ROPOS in water again. | |
10 | 53 | 1520 | 234 | 423682 | 5087227 | ROPOS is on the bottom. Two fish. Near Mkr-33. | |
10 | 55 | 1521 | 110 | 424415 | 5087823 | Fixes no good. | |
10 | 57 | 1518 | 8 | 423858 | 5087078 | Looking for Mkr-33. ROPOS is about 24 m away from Mkr-33 according to nav. | |
10 | 59 | 1523 | 331 | 423765 | 5087178 | Fixes still no good. | |
11 | 0 | 1521 | 17 | 424488 | 5086783 | Arrive at Mkr-33. Good fix. | |
11 | 2 | 1522 | 344 | 423856 | 5087103 | Good fix. Frame grab color is good. | |
11 | 8 | 1522 | 248 | 423856 | 5087105 | Positioning HFS (Hot Fluid Sampler) probe for sampling. | R485-1 |
11 | 9 | 1522 | 248 | 424412 | 5087823 | Temp up to 63C during probe positioning for HFS. | |
11 | 12 | 1522 | 228 | 423850 | 5087572 | Repositioning sub. Trying to find probe position with highest Temp reading. | |
11 | 14 | 1523 | 211 | 423853 | 5087104 | Temp at about 58C | |
11 | 15 | 1523 | 211 | 423861 | 5087105 | Position of probe during sampling. | R485-2 |
11 | 16 | 1523 | 210 | 423859 | 5087083 | Starting sample HFS2 | HFS2_dfl _R485-1 |
11 | 17 | 1523 | 213 | 423842 | 5087728 | temp 5 intake 40 on manifold. Good temps. | |
11 | 19 | 1523 | 212 | 424399 | 5086596 | Range on T2 is 37 to 49. | |
11 | 20 | 1523 | 210 | 423888 | 5087631 | Stop HFS2. Volume sampled was 56ml. | |
11 | 22 | 1523 | 213 | 423857 | 5087108 | HFS23 Piston sample for gas tight started. T1 53 | HFS23_dfl
_R485-2 |
11 | 23 | 1523 | 210 | 423890 | 5087613 | Done T2 42-50. vol 13 ml. | |
11 | 25 | 1523 | 213 | 424443 | 5087470 | HFS12 DNA sample. T1 = 49 T2 is 37. | HFS12_dfl
_R485-3 |
11 | 34 | 1523 | 211 | 424410 | 5087494 | Sample finished. max T 54.6 vol = 123ml | |
11 | 35 | 1523 | 213 | 423852 | 5087105 | HFS14 started. Bag sample. | HFS14_dfl
_R485-4 |
11 | 41 | 1523 | 212 | 423574 | 5087340 | Sample done vol = 10ml. | |
11 | 43 | 1523 | 213 | 423860 | 5087082 | HFS17 bag sample, no filter. Max T on last bag sample was 48.8C. | HFS17_dfl
_R485-5 |
11 | 45 | 1523 | 214 | 424490 | 5088046 | Video has gone bad due to bright input to overlay. | |
11 | 45 | 1523 | 214 | 424287 | 5086270 | Video OK. | |
11 | 46 | 1523 | 212 | 423858 | 5087093 | Video bad. | |
11 | 46 | 1523 | 211 | 423844 | 5087062 | Sample done. Vol = 650ml. Max T 52.5C | |
11 | 48 | 1522 | 218 | 423856 | 5087104 | Lost position. Alarm for oil reservoir empty suddenly. Shut down. | |
11 | 50 | 1522 | 230 | 424104 | 5087602 | ROPOS returning to surface due to loss of oil. Ship moving forward in order to stream ROPOS behind cage. | |
11 | 55 | 1492 | 252 | 425326 | 5086999 | VCR tapes turned off. | |
13 | 56 | 186 | 3 | 422757 | 5088424 | Begin returning ROPOS to cage. | |
14 | 55 | 107 | 216 | 422710 | 5089068 | Still having great difficulty getting the sub back into the cage. | |
16 | 25 | 89 | 112 | 422710 | 5089068 | The cage is being brought to the surface. An attempt will be made to get the sub into the cage just below surface. The earlier attempts to get the sub in the cage at around 20m did not work. | |
16 | 49 | 128 | 123 | 422710 | 5089068 | ROPOS was driven back into the cage at 128 meters, not at the surface. | |
16 | 59 | 0 | 115 | 422710 | 5089068 | ROPOS is back on deck. | |
Dive
Summary for R485:
ROPOS was in the water at 0706, 25 June 9. When the cage reached 1315m it was determined that ROPOS was still tied to the cage by a rope. ROPOS returned to the surface and the rope was removed. Dive was restarted at 0936. |
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ROPOS reached the bottom at 1053 and Mkr-33 was located at 1100. The sampling probe for the fluid sampler was positioned in the crack, based on the highest temperature measurement. This also appeared to be the area of highest flow. | |||||||
Five HFS samples were collected. At 1148 the sub was shut down due to a loss of hydraulic oil. ROPOS returned to the surface, after some difficulty getting the sub back into the cage. |