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.

 
      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.