Dive 548

UTC

Z(m)

Hdg

UTM X

UTM Y

Comments - Dive R548

Samples

Investigator

SubSmps

FrGrb#

Positions in utm x/y columns are automated and not flagged for accuracy. Consult dive maps for final position data.

Tasks: Deploy benchmarks at caldera center near BPR, Magnesia, Mkr-33, and BagCity. Move osmo from Magnesia to Mkr-N41. Hook up NemoNet '99 camera to release mooring (Mkr-N41). Deploy MTR's, suction sample, and twg's Joystick, FeCity, BagCity.

Bottom Time: JD191(7/9) 0836- JD192(7/10) 0255

07:18:43 Jul 09 '00

0

221

424081

5086557

ROPOS in the water

08:31:23 Jul 09 '00

1480

272

424081

5086557

We are ready to rock and roll.

08:36:33 Jul 09 '00

1532

0

424081

5086557

Ropos on the bottom. We should be near the center of the caldera.

08:40:33 Jul 09 '00

1532

359

421747

5089515

Photo 1. We are looking for the BPR mooring, should be 50 m to the north.

08:40:33 Jul 09 '00

1532

359

421747

5089515

Bottom, near BPR mooring.

R548-001

08:42:13 Jul 09 '00

1530

1

421747

5089515

Traversing ropy sheet flow, some is jumbled. Flying over a few sea stars and ophiuroids.

08:48:25 Jul 09 '00

1535

9

421747

5089515

Brittle stars and small rattail.

08:48:25 Jul 09 '00

1535

9

421747

5089515

Ophiuroid and vent fish near BPR mooring.

R548-002

08:50:55 Jul 09 '00

1535

360

421747

5089515

Vent fish and ophiuroids at the middle of caldera.

R548-003

08:51:25 Jul 09 '00

1535

2

421747

5089515

Large gastropod on lava - looks like a white blob from the distance. Tried to get some close up video.

09:03:37 Jul 09 '00

1527

289

421747

5089515

BPR mooring.

R548-004

09:04:07 Jul 09 '00

1534

311

421747

5089515

BPR mooring.

R548-005

09:03:07 Jul 09 '00

1526

289

421747

5089515

At the BPR mooring. Found it by coming up in the water column 5 m and used the mesotech to release it. We were unable to use the acoustic release on the mooring to talk to it. Photo 2 of BPR.

09:06:57 Jul 09 '00

1534

328

421747

5089515

Still photos 3, 4 of BPR.

09:07:27 Jul 09 '00

1534

309

421747

5089515

Photo 5 of BPR on lobate flows.

09:07:47 Jul 09 '00

1535

300

421747

5089515

BPR mooring.

R548-006

09:09:49 Jul 09 '00

1535

337

421747

5089515

Benchmark-63

R548-007

09:10:19 Jul 09 '00

1535

337

421747

5089515

DEPLOYING Bmrk-63.

09:16:19 Jul 09 '00

1535

1

421738

5089566

Photo #6 of Bmrk-63

09:18:29 Jul 09 '00

1536

343

421738

5089566

Bmrk-63 in place.

R548-008

09:20:59 Jul 09 '00

1535

347

421738

5089566

Pressure measurement at Bmrk-63.

R548-009

09:26:21 Jul 09 '00

1536

347

421738

5089566

Bmrk-63

R548-010

09:27:31 Jul 09 '00

1535

347

421738

5089566

Bmrk-63

R548-011

09:20:49 Jul 09 '00

1535

347

421738

5089566

Taking pressure measurement at Bmrk-63. Start at 09:21 end at 9:46.

09:41:43 Jul 09 '00

1535

347

421738

5089566

Photo #7 of Bmrk-63.

09:46:13 Jul 09 '00

1536

336

421738

5089566

Bmrk-63.

R548-012

09:46:35 Jul 09 '00

1536

332

421738

5089566

Cage motor has been turned off for a good fix for benchmark location.

09:55:25 Jul 09 '00

1536

329

421718

5089568

Two transponder ROPOS fix for Bmrk-63 x=421717 y=5089568. The ONLY fix.

09:57:25 Jul 09 '00

1529

58

421718

5089568

Transit to Magnesia, going to take ~1hr. Bringing ROPOS to cage, going to "swim" in front of cage. Moving ship SE at 1 knot for 2.1 km. Video is off at 10:01.

11:18:27 Jul 09 '00

1471

116

422508

5089153

Seeing a plume in the water column about 200 m NW of Magnesia. ROPOS is up by the cage at 1472 m.

11:32:11 Jul 09 '00

1485

121

423655

5088579

Now over Magnesia and still seeing plume in the SIT camera 60 m off the bottom.

11:34:23 Jul 09 '00

1489

152

423666

5088550

Heading down to bottom at Magnesia vent.

11:37:11 Jul 09 '00

1523

142

423001

5089180

Video has been turned back on.

11:38:51 Jul 09 '00

1526

158

423663

5088549

Looking at a "city" of pillars. Looking for Magnesia marker.

11:43:33 Jul 09 '00

1525

257

423652

5088581

Have spotted Mkr-67 for Magnesia vent area.

11:48:23 Jul 09 '00

1527

53

423661

5088545

Attempting to deploy Bmrk-1 at Mkr-67.

11:54:23 Jul 09 '00

1527

183

423658

5088548

DEPLOYMENT of Bmrk-1. Going to take pressure measurement.

11:57:13 Jul 09 '00

1527

189

423659

5088548

Pressure measurement of Bmrk-1 at Magnesia.

R548-013

11:56:13 Jul 09 '00

1528

189

423661

5088544

Pressure recording beginning at 11:57.

12:00:13 Jul 09 '00

1527

189

423659

5088548

Photo #8 taken of pressure measurement.

12:18:15 Jul 09 '00

1528

188

423010

5089154

Finished with pressure measurement and now looking for OSMO and place to SS.

12:19:25 Jul 09 '00

1527

181

425637

5087836

Photos 9, 10, 11, 12 taken of Bmrk-1.

12:20:05 Jul 09 '00

1527

68

425637

5087836

Layout for Bmrk-1 at Magnesia with Mkr-in background.

R548-014

12:20:55 Jul 09 '00

1527

48

425637

5087836

Photo 13, 14, and 15 taken of osmo, which is east of marker.

12:28:45 Jul 09 '00

1531

147

423660

5088555

Preparing for FeO suction sample---Ian has created a small flurry of FeO.

12:29:25 Jul 09 '00

1531

145

422971

5089183

Start suction 12:28 for FeO - Suction ended 12:31. Appears very fluffy, looks like last years bacterial flock is now covered with FeO. (Rock chips subsmp). Magnesia Mkr-67 - x=423661 y=5088545.

R548-SS-J1-0001

Fortin

J Chadwick

12:33:15 Jul 09 '00

1531

146

422971

5089183

Beautiful lava pillar at Magnesia.

R548-015

12:35:05 Jul 09 '00

1531

144

422962

5089175

Now going to pick up osmosampler.

12:35:25 Jul 09 '00

1531

145

422962

5089175

Photo #13 taken.

12:36:37 Jul 09 '00

1528

222

422973

5089171

Bmrk-1 does not look flat.

R548-016

12:37:47 Jul 09 '00

1529

239

423664

5088553

While in transit to osmosampler, bmrk looked on a slant and as a result will reposition.

12:43:47 Jul 09 '00

1528

245

422976

5089169

Benchmark has been moved and now positioning pressure measuring device to take a reading.

12:48:37 Jul 09 '00

1528

241

423660

5088548

Pressure measurement of Bmrk-1 at new position Magnesia.

R548-017

12:45:37 Jul 09 '00

1528

240

423660

5088548

Start of pressure measurement at 12:46. End pressure measurement at 12:58

12:58:47 Jul 09 '00

1527

247

422977

5089165

ROPOS was pulled off bmrk while taking pressure reading and the bmrk was jarred so must reposition bmrk again.

13:08:20 Jul 09 '00

1528

351

425665

5087756

3rd take of pressure measurement on Bmrk-1 at Magnesia.

R548-018

13:05:59 Jul 09 '00

1528

350

425665

5087756

Bmrk-1 has been repositioned and pressure measurement must be taken again...start time 13:07 end time 13:27 Photo 17 while taking measurement. Photos 18 and 19 taken after measurement.

13:29:40 Jul 09 '00

1526

316

425667

5087769

Final(?) position of Bmrk-1 at Magnesia

R548-019

13:34:32 Jul 09 '00

1531

325

423660

5088546

Have picked up osmosampler but it appears that some rocks have fallen on the tubing.

13:37:42 Jul 09 '00

1531

318

423660

5088546

Osmosampler has been picked up and moving it to Nascent.

13:42:52 Jul 09 '00

1528

48

423664

5088546

Photo 20 taken after picking up and securing the osmo sampler. Moving it over to Nascent, distance of 1187m away to SE (164 heading). Turned off Embley archive tapes.

14:47:26 Jul 09 '00

1477

210

423793

5087244

Interesting looking snot??? in transit to Nascent

R548-020

14:50:26 Jul 09 '00

1479

212

423941

5087524

Ship has arrived at Cammoor (NeMO'99 camera release mooring).

14:53:56 Jul 09 '00

1484

155

423941

5087524

ROPOS going to the bottom.

14:58:08 Jul 09 '00

1520

88

423996

5087467

On the bottom, headed to the east.

15:02:28 Jul 09 '00

1520

131

424015

5087456

MTR mooring cable has been mowed over by lava.

15:01:48 Jul 09 '00

1519

136

424015

5087456

Line in new flow.

R548-021

15:02:38 Jul 09 '00

1520

197

424015

5087456

Mooring line covered by new flow.

R548-022

15:03:58 Jul 09 '00

1520

174

424015

5087456

MTR mooring line in the flow.

R548-023

15:06:08 Jul 09 '00

1520

135

423960

5087332

Good fix: x=423960 y=5087332. (Mooring line overrun by lava)

15:09:18 Jul 09 '00

1517

88

424046

5087439

Found camera mooring.

15:10:08 Jul 09 '00

1518

99

424049

5087421

Crab on Nemonet'99 camera mooring.

R548-024

15:13:08 Jul 09 '00

1515

80

423996

5087329

Headed to the Nemonet'99 camera site (near Nascent).

15:18:48 Jul 09 '00

1518

310

423994

5087472

Moving the ship 60m to the NW.

15:29:50 Jul 09 '00

1519

327

423846

5087237

Still looking for the Nemonet'99 camera (near Nascent - Mkr-N41)

15:31:10 Jul 09 '00

1519

58

423846

5087237

Mkr-N41 spotted in the distance.

15:31:50 Jul 09 '00

1518

49

423897

5087412

Photo 21 taken (counter is 2 photos behind).

15:32:20 Jul 09 '00

1521

101

423957

5087492

Photo 22 taken.

15:32:40 Jul 09 '00

1521

98

423957

5087492

Set down OSMO (the one picked up at Magnesia) at Mkr-N41. Will get it at a later time.

15:34:10 Jul 09 '00

1521

100

423911

5087406

Looking for a good place to deploy some MTRs. Found some shimmery flow.

15:36:20 Jul 09 '00

1520

166

423911

5087406

3 meters south of Mkr-N41. Getting ready to deploy MTR_3211.

15:37:50 Jul 09 '00

1520

167

423895

5087405

DEPLOYED MTR_3211 in a clump of tubeworms and limpets (shimmery flow).

15:39:10 Jul 09 '00

1520

156

423901

5087412

MTR positioned at Mkr-N41.

R548-025

15:42:50 Jul 09 '00

1520

159

423901

5087412

Getting ready to deploy MTR_3309.

15:43:40 Jul 09 '00

1520

161

423901

5087412

Another MTR at Mkr-N41, buried in limpets, palm worms.

R548-026

15:43:40 Jul 09 '00

1520

161

423901

5087412

DEPLOYED MTR_3309 in another clump of tubeworms and limpets (shimmery flow). About 5 m south of N41. Near Nemonet99 camera, so it's closer to Mkr-M. Photo 23 taken.

15:45:20 Jul 09 '00

1519

205

423901

5087412

Photo 24 taken.

15:45:30 Jul 09 '00

1519

218

423901

5087412

Photo 25 taken.

15:45:40 Jul 09 '00

1517

221

423901

5087412

Nemonet'99 camera sitting on the bottom before being transported to its release mooring.

R548-027

15:46:10 Jul 09 '00

1518

215

423901

5087412

Photo 27, 28 taken.

15:47:10 Jul 09 '00

1519

312

423967

5087490

Photo 29, 30, and 31 taken of Nemonet '99 camera.

15:46:30 Jul 09 '00

1517

232

423967

5087490

Fouling on the frame of Nemonet'99 camera.

R548-028

15:46:50 Jul 09 '00

1519

267

423967

5087490

Fouling on Nemonet'99 lens.

R548-029

15:49:20 Jul 09 '00

1520

356

423967

5087490

Photo 32 taken. Nemonet'99 camera is covered in gunk.

15:52:52 Jul 09 '00

1519

11

423967

5087490

Highlights turned on.

15:54:42 Jul 09 '00

1516

222

423906

5087377

ROPOS is grabbing the camera by its aluminum frame.

15:56:52 Jul 09 '00

1520

229

423909

5087397

Headed back to the camera recovery mooring. 200m away, bearing of 114.

15:59:42 Jul 09 '00

1519

120

423907

5087384

Highlights turned off.

16:04:42 Jul 09 '00

1520

148

423899

5087369

ROPOS is getting a better grip on the camera's frame.

16:09:22 Jul 09 '00

1518

114

423899

5087369

Moving the ship back to Cammor (camera mooring).

16:19:12 Jul 09 '00

1519

90

424043

5087438

Still headed to the camera mooring.

16:23:24 Jul 09 '00

1518

134

423988

5087341

Found it! Photo 33 taken of Nemonet'99 camera next to its recovery mooring.

16:23:54 Jul 09 '00

1515

143

424003

5087340

Highlights on.

16:25:24 Jul 09 '00

1518

121

423997

5087344

Nemonet'99 camera and camera mooring position: x=424003, y=5087340.

16:26:14 Jul 09 '00

1518

125

423995

5087346

Photo 34 and 35 taken.

16:25:44 Jul 09 '00

1518

129

423995

5087346

Crab on Nemonet'99 camera mooring.

R548-030

16:27:54 Jul 09 '00

1518

41

423995

5087346

Photo 36 taken.

16:31:34 Jul 09 '00

1521

150

424008

5087330

Photo 37 taken.

16:32:54 Jul 09 '00

1519

344

424008

5087330

Photo 38 taken of Nemonet'99 camera.

16:33:14 Jul 09 '00

1519

298

424008

5087330

Hooking up the Nemonet'99 camera to the recovery mooring.

16:32:14 Jul 09 '00

1518

46

424008

5087330

Nemonet'99 camera on the release mooring.

R548-031

16:32:44 Jul 09 '00

1519

19

424008

5087330

Close up of Nemonet'99 camera on release mooring.

R548-032

16:35:54 Jul 09 '00

1520

332

424004

5087323

Photo 39 taken.

16:36:54 Jul 09 '00

1521

339

424004

5087323

Hooked up camera recovery mooring to the camera. Photo 40 taken.

16:36:54 Jul 09 '00

1521

339

424004

5087323

Hooking release mooring line onto the Nemonet'99 camera.

R548-033

16:38:04 Jul 09 '00

1521

337

424004

5087323

Photo 41,42 taken of the camera.

16:40:04 Jul 09 '00

1517

149

424004

5087323

Photo 43, 44 taken.

16:39:04 Jul 09 '00

1519

72

424004

5087323

Nemonet'99 on release mooring.

R548-034

16:40:04 Jul 09 '00

1517

149

424004

5087323

Nemonet'99 hooked up to release mooring.

R548-035

16:40:54 Jul 09 '00

1517

110

424004

5087323

Headed to Mkr-33 now. Going back to the cage first, to transit in water column. Highlights off 16:41.

16:42:54 Jul 09 '00

1489

66

422792

5087277

Ship moving to Mkr-33: Range of 276, bearing of 213.

16:45:24 Jul 09 '00

1488

169

423963

5087235

All tapes off.

17:16:50 Jul 09 '00

1488

283

423823

5087041

Taking a look at the cage; going down to the bottom now. We're about 40 meters SW of Mkr-33.

17:19:40 Jul 09 '00

1521

311

423834

5087060

At the bottom now.

17:23:00 Jul 09 '00

1488

45

423813

5087082

Went back up to the cage. 20 m SW of Mkr-33.

17:25:50 Jul 09 '00

1489

288

423807

5087058

Two benchmarks (tied together) tossed out of the cage, 25 M SW of Mkr-33. Tapes on again.

17:31:10 Jul 09 '00

1524

55

423813

5087056

ROPOS at the bottom, looking at the benchmarks.

17:32:00 Jul 09 '00

1524

54

423813

5087053

Photo 45 taken of benchmarks.

17:32:20 Jul 09 '00

1524

53

423813

5087053

Picked up the two benchmarks.

17:33:30 Jul 09 '00

1520

63

423819

5087058

Headed east to get closer to Mkr-33, benchmarks in hand.

17:35:10 Jul 09 '00

1522

90

423824

5087051

Larval traps and Mkr-33 in view!

17:37:00 Jul 09 '00

1523

60

423830

5087059

Put the benchmarks down, separating the two benchmarks.

17:39:40 Jul 09 '00

1523

51

423831

5087057

Turned Bmrk-4 right side up.

17:40:00 Jul 09 '00

1523

51

423831

5087057

Turned Bmrk-5 right side up.

17:44:12 Jul 09 '00

1523

68

423831

5087058

Picked up /bmrk-4 in left hand, Bmrk-5 in right hand, going around to look for a place to put one where there is no flow.

17:46:32 Jul 09 '00

1523

49

423835

5087106

Photo 46 taken.

17:46:52 Jul 09 '00

1523

45

423827

5087063

Bmrk-5 DEPLOYED at Mkr-33

17:54:02 Jul 09 '00

1523

44

423836

5087107

Waiting for the GPS to settle down before we start pressure measurement.

17:55:02 Jul 09 '00

1523

44

423825

5087066

Tapes changed at 17:52

17:56:02 Jul 09 '00

1523

48

423829

5087066

Getting ready to start the pressure measurement.

17:58:02 Jul 09 '00

1523

44

423841

5087090

Placing pressure sensor on Bmrk-5

17:59:12 Jul 09 '00

1523

44

423839

5087110

Started pressure measurement.

18:00:22 Jul 09 '00

1523

44

423838

5087109

Benchmark 5 position: x=423838 y=5087111 z=1523. 15 m NW of Mkr-33 at a bearing of 306.

18:00:32 Jul 09 '00

1523

45

423838

5087109

Pressure measurement at Bmrk-5 at Mkr-33.

R548-036

18:20:24 Jul 09 '00

1523

44

423839

5087108

End of pressure reading.

18:23:04 Jul 09 '00

1523

64

424547

5087574

Putting pressures sensor back.

18:24:54 Jul 09 '00

1523

64

423816

5087114

Coming off the bottom, headed up to the cage. Benchmark 4 in hand. Tapes off.

18:28:44 Jul 09 '00

1488

77

423819

5087059

Ship moving from Mkr-33 to BagCity at one knot. 2 km away, at a bearing of 195. ROPOS transiting in water column.

20:10:02 Jul 09 '00

1522

12

423465

5085372

Arrived on bottom at BagCity. Starting archive tapes, Juniper and Tunnicliffe.

20:13:02 Jul 09 '00

1532

14

422999

5084529

Highlights turned on.