Woods Hole Oceanographic Institution

Cruise Planning Synopsis

view revisions

AT37-09 McGuire "Chile Geodesy"


R/V Atlantis


ROV Jason

Cruise Party

Jeff McGuire: Chief Scientist, Principal Investigator
Woods Hole Oceanographic Institution Clark South 272A, MS#24 Woods Hole, Ma. USA 02543
+1 508 289 3290

Departure: Feb 26, 2017

Arica Chile

Arrival: Mar 9, 2017

arica chile

Operations Area

Offshore Iquique Chile
Lat/Lon: 21° 0.0′ S / 70° 40.0′ W
Depth Range: 1000 / 2100
Will the vessel be operating within 200 NM of a foreign country? Chile
Are visas or special travel documents required? no

Science Objectives

The goal is to use seafloor geodetic equipment to record the strain associated with the Northern Chile subduction zone.   We will install instruments that are expected to remain on the seafloor for 2-3 years and will be recovered on a later cruise.   Our collaobrators from Germany will use a waveglider to visit their already installed instruments on the seafloor.

Science Activities

We will install 9 systems on the seafloor.  All of these systems will be pre-deployed on a wire in an array that is about 15 km long.   Then, assuming all goes well, we will conduct one very long Jason dive to vistit all of them and complete their installations,  verify the seafloor conditions and benchmark quality, and collect initial measurements.

Additionally some of our colleagues from GEOMAR in Germany will conduct waveglider based communications with their equipment that is already on the seafloor in this vicinity.

Additional Info

Pre-cruise Planning Meeting: Visit WHOI
Meeting Notes: We've already had a few meeting with DSL. can do one in the village in either december or january.


Supporting documentation:

Notes: USBL status, .3 degree offset, compensated by casius.

Beacon on trawl wire.  Do we have clamps for the trawl wire.  We have clamps that work on the trawl wire - is this a sonardyne beacon??

Waveglider is busted, not going.

Robbie emailed us these questions:1- What sort of release is being used to let go of the tripods at the bottom?  How will you talk to it?

2- We, (the ship), might want a weight on the trawl cable, (so there is some weight during recovery), however this probably not a huge issue since the trawl winch uses a traction head.

3- How much accuracy are you looking for during the initial deployment?  It sounds like you only want to move the tripods if you have to, correct?  That is, if they don't talk to each other.  But it's not clear how precise the initial placement should be.

4- Are we actually setting these directly on the bottom, or are we dropping them the last few meters?

LADCP:  I (Dan Torres) have discussed the LADCP requirements with Jeff McGuire for his cruise on Atlantis. They only need the LADCP measurements for 2 - 3 casts. Therefore, the full dual LADCP system with external battery is not needed. I have one LADCP unit that can accommodate an internal alkaline battery pack. That should provide enough power for all casts.  (picture 0609151233a.jpg is a pic of the LADCP)


Funding Agency: NSF
Grant or contract number: 1459095

Scientific Instrumentation for R/V Atlantis

Shipboard Equipment

12 kHz Pinger for Wire Use
ADCP 75 kHz
Bathymetry System 12 kHz
Bathymetry System 3.5 kHz
Navigation - Heading
Navigation - Position
Relay Transponder for Wire Use
Transponder Navigation - Sonardyne USBL

Shipboard Communication

Basic Internet access via HiSeasNet
Is there an expectation to use Skype or any other real-time video conference program?

CTD/Water Sampling

911+ Rosette 24-position, 10-liter bottle Rosette with dual T/C sensors

Critical CTD Sensors

CTD-Related Equipment

Lowered Acoustic Doppler Current Profiler (LADCP)
Storage Notes:


Will you be using Long Base Line (LBL) navigation? no
How many nets? null
How many tansponders? null
Will you be using Ultra-short baseline (USBL) navigation?no


Navigation Notes: We will need real-time naviation of USBL beacon on the end of the trawl wire to know the release location of our packages when they are deployed to the seafloor.


CTD Winch with .322" Electro-mechanical wire
Mooring / TSE winch
Trawl Winch with .681 fiber optic
Winch Notes: We will be deploying approximately 12 significant packages (4m high tripods, 25 m mooring, sets of anchors) to the seafloor with the trawl winch.   we will do all of this work upon arriving on station and then my understanding is that we will have to switch the main winch over to Jason for the remaineder of the cruise?

Winch Notes: Chad S- All trawl wire deployments of the 8 tripods and single mooring will be deployed first, before switching over to the block for Jason deployment. Jason's primary mission is to make adjustments to the placement of each system.

Standard Oceanographic Cables

Slip ring required? no
Non-standard wire required? no
Traction winch required? no

Specialized Deck Equipment

Mooring Deployment/Recovery Equipment Required: no Type: 
Cruise Specific Science Winch Required: no Type: 
Nets Required: no Type: 

Over the Side Equipment

Will you be bringing any equipment (winches, blocks, etc.) that lowers instruments over the side? no

Special Requirements

Elecrical Power: no Identify 
Equipment Handling: no Identify: 
Inter/intraship Communications: no Identify: 
Science Stowage: no Identify: 
Water: no Identify: 

Additional Cruise Items/Activities

Explosive Devices:no
Portable Air Compressors:no
Flammable Gases:no
Small Boat Operations:no
SCUBA Diving Operations:no

Hazardous Material

Will hazardous material be utilized?yes
Describe deployment method and quantity:
9 of our instruments will have lithium battery packs.

Radioactive Material


Additional Information

Is night time work anticipated on this cruise?yes
Specialized tech support (Seabeam, coring, other):
Other required equipment and special needs:

<Could not load the preview of ROV Jason Information data >

Checklist & Notes


U.S. Customs Form: no
Diplomatic Clearance: no
Date Submitted:
Date Approved:
Agent Information:
Isotope Use Approval: no
Isotope Notes:
SCUBA Diving: no


SSSG Tech: