2023-10-24T16:38:11.396

NotApplicable

2023-10-24T18:26:03.988

ROV test dive for INSAS, MAPRs and other sensors. No official dive plan!

2023-10-27T14:00:35.914

NotApplicable

2023-10-28T06:06:48.437

First ROV dive of FKt231024 with INSAS and M3 mapping

2023-10-28T09:50:22.287

NotApplicable

2023-10-28T13:55:41.097

INSAS calibration dive at Rose garden site.

2023-10-28T21:03:43.512

NotApplicable

2023-10-28T21:46:06.176

1. M3 mapping: 2000 m westward survey along ridge, 300 m wide survey at 50 m altitude. Estimated ~8 hours duration. 2. Eastward transect along seafloor back towards start of dive area. 3. INSAS calibration survey (PENDING) Dive Objectives: 1. Create a full coverage M3 map of entire dive area 2. Visual surveys and sampling of hydrothermal related features on the seafloor (sampling details outlined below.). includes a photomosaic survey towards end of dive. 3. INSAS calibration survey on pre-configured patch test survey geometry followed by two 300 m lines (separated by 80 m) Start of eastward visual survey will likely encounter inactive venting sites. Low-temperature venting is known to occur at the eastern limit of the transect.

2023-10-28T22:41:32.155

NotApplicable

2023-10-30T06:35:04

Take 2 on this dive after potentially fixing the ground fault 1. M3 mapping: 2000 m westward survey along ridge, 300 m wide survey at 50 m altitude. Estimated ~8 hours duration. 2. Eastward transect along seafloor back towards start of dive area. 3. INSAS calibration survey (PENDING) Dive Objectives: 1. Create a full coverage M3 map of entire dive area 2. Visual surveys and sampling of hydrothermal related features on the seafloor (sampling details outlined below.). includes a photomosaic survey towards end of dive. 3. INSAS calibration survey on pre-configured patch test survey geometry followed by two 300 m lines (separated by 80 m) Start of eastward visual survey will likely encounter inactive venting sites. Low-temperature venting is known to occur at the eastern limit of the transect.

2023-10-30T11:57:57.172

NotApplicable

2023-10-31T14:06:07.182

1. M3 mapping - 1600 m westward survey along ridge, 300 m wide survey - 50 m altitude - ~8 hours 2. Eastward transect along seafloor - Transect back towards start of dive area 3. INSAS calibration survey (PENDING)

2023-10-31T19:05:34.219

NotApplicable

2023-11-01T21:15:51.349

Dive Description: 1. M3 mapping - Continuous survey over ridge - 50 m altitude - ~10 hours 2. InSAS mapping 3. Sampling/Imaging Dive Activities/ Objectives: 1. Magnetometer calibration 2. Create a full coverage M3 map of entire dive area 3. Test InSAS with two parallel survey lines. If adequately flat terrain is identified in M3 data, a patch test will also be run. 4. Visual surveys and sampling of hydrothermal related features on the seafloor (sampling details outlined below. Survey will be 300 m E-W lines, spaced 50 m apart. Start in the NW, working southward, then translate to the east, continue northward, then translate west again and work southward. All waypoints attached. Low-T plume: trigger 1x 2.5L Niskin as close to source of plume as possible Hydrothermal precipitates: collect sulfide/oxide/highly-altered basalt rock samples (into coral quivers (priority swing arm quivers). Volcanic rocks: collect blue andesite (grab a few samples, into one biobox) IF high-T sulfides present, also collect 2x 5L niskins near vents (but not necessarily in plume) Skate Eggs: (carefully!!) into biobox Collect vent animals: Riftia (just a couple), clams, mussels, limpets, shrimp (all can go into one biobox for each site; except shrimp into suction sampler). Sediment push cores: opportunistic; tall core, biology core and geology core taken at every coring site. (NOTE: push core set “3” have core catchers Corals: Scleracyonacea (whole), Malacalcyonacea (fragment) Sponges: Opportunistic and if space is available.

2023-11-02T01:54:59.569

NotApplicable

2023-11-03T04:11:47.549

1. Magnetometer calibration 2. Collect any InSAS data over the Tempus Fugit vent site. 3. Photomosaic grid with M3 4. Visual surveys and sampling of hydrothermal related features on the seafloor (sampling details outlined below.

2023-11-04T21:21:23.683

NotApplicable

2023-11-04T23:37:22.68

This dive is to recover current meters left behind by previous expedition FKt230918 (Cathleen Robert) on leg 1 of their trip. depths 400-500m.

2023-11-06T15:47:37.886

NotApplicable

2023-11-07T18:41:26

1. Magnetometer calibration during decent 2. InSAS calibration/patch test. a. Test consists of two parallel 300 m ~N-S lines (each flown in both directions) followed by a 510 m ~W-E line. 3. Transit ~550 m SSE towards active vents at Iguanas W 4. Eastward progression along axis observing and sampling hydrothermal vents and associated biology.

2023-11-07T22:34:42.348

NotApplicable

2023-11-09T15:03:27.537

Dive will be divided in to 6-hour blocks of alternating SAS mapping and sampling: 15:00 Launch 16:30 Hydrophone deployment at seafloor 17:00 SAS Mapping 23:00 Sampling (Iguanas W) 03:00 Lander recovery (by ship at surface) 04:00 SAS Mapping 10:00 Sampling (Iguanas E and W) 15:00 ROV Off bottom Primary activities on this dive include: 1. Deployment of DAL hydrophone lander near active vents at Iguanas East a. Lander will be carried to the seafloor by the ROV and placed at the foot of the active black smoker complex b. Once during the InSAS surveys, the position of the lander will be moved ~100 m by the ROV c. Lander ascent is set for 12 hours after launch. Lander will ascend to surface for recovery by ship while ROV remains at seafloor. 2. InSAS mapping a. Continuous survey over ridge for ~ 6 hours of bottom time i. Interrupted once for repositioning of hydrophone lander b. Waypoints provided in .csv file c. Constant depth within altitude range of 12-30 m d. More SAS mapping after 6 hours of sampling 3. Imaging and sampling of active vents at Iguanas West a. Similar to previous dives (see details below) b. Two blocks of time (after SAS surveys)

2023-11-09T19:16:44.666

NotApplicable

2023-11-10T23:15:16.52

Carry down DAL hydrophone lander and deploy near active vents Sampling of active hydrothermal vents at Pinguinos • Rocks, Niskins • Photogrammetry transects away from active vents • ~6 hours (until ~20:00) InSAS mapping • ~ 8 hours (until ~04:00) Exploration of the area • Sites of active/inactive vents identified from Sentry bathymetry - ~12 hours (until ~16:00) • Rock and coral sampling Return to DAL lander and turn it on with magnet

2023-11-12T11:52:07.478

NotApplicable

2023-11-13T10:00:00

Dive will be split into two activities: 1. Mapping (M3) – 13 hours 2. Sampling/exploration – 11 hours

2023-11-13T13:55:47.982

NotApplicable

2023-11-14T15:27:08

The continuation of the previous dive: Sampling/exploration – 11 hours

2023-11-14T19:33:13.871

NotApplicable

2023-11-15T21:34:47

Dive Activities/ Objectives: 1. Magnetometer calibration. 2. M3 mapping a. Additional couple of lines to the data collected during S0614 b. Mapping of new area to the west of the area surveyed during S0614 3. Explore targets identified in the mapping a. Particularly interested in active and inactive hydrothermal vents b. Sampling limited to rock, sediments, and coral sampling c. Photogrammetry transects 300 m away from vents, if any new active vents are discovered Difficult to provide a more detailed plan for the sampling part of the dive as it will depend on what features we find during the M3 survey.

2023-11-15T23:56:26.48

NotApplicable

2023-11-16T18:06:38.8

1. Magnetometer calibration. 2. M3 mapping a. Mapping of eastern edge of Eastern caldera 3. Explore targets identified in the mapping a. Particularly interested in active and inactive hydrothermal vents b. Sampling limited to rock, sediments, and coral sampling c. Photogrammetry transects 300 m away from vents, if any new active vents are discovered Difficult to provide a more detailed plan for the sampling part of the dive as it will depend on what features we find during the M3 survey.