Woods Hole Oceanographic Institution

Cruise Planning Synopsis

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AR30-06: Pickart "OSNAP West"


RV Neil Armstrong

Cruise Party

Robert Pickart: Chief Scientist, Principal Investigator
Woods Hole Oceanographic Institution Clark 359B, MS#21 Woods Hole, Ma. USA 02543
+1 508 289 2858

Fiamma Straneo: Principal Investigator
Woods Hole Oceanographic Institution Clark 339, MS#21 Woods Hole, Ma. USA 02543
+1 508 289 2914

Departure: Aug 27, 2018

Reykjavik, Iceland

Arrival: Oct 3, 2018

Reykjavik, Iceland

Operations Area

Southern Greenland; Denmark Strait
Lat/Lon: 59° 20.0′ N / 43° 50.0′ W
Depth Range: 100 / 3500
Will the vessel be operating within 200 NM of a foreign country? Canada, Greenland, Iceland
Are visas or special travel documents required? no

Science Objectives

This research is part of the Overturning in the Subpolar North Atlantic Program (OSNAP), an effort to determine the strength of the meridional overturning circulation and associated heat and freshwater fluxes in the subpolar North Atlantic. It is a collaborative program with scientists from several nations, including the U.K., the Netherlands, Germany, France, Canada and China.

The specific objectives of this cruise are as follows:

1. To service 18 current meter and sound source moorings in the southeast Labrador Sea and southwest Irminger Sea.
2. To conduct a hydrographic/velocity survey in the vicinity of Cape Farewell and in Denmark Strait.

Science Activities

1. We will recover 18 moorings and deploy 17 moorings. There are three types of moorings: tall oceanographic moorings (9); shelf-tripods (8); sound source mooring (1).

2. We will occupy CTD/LADCP/Microstructure stations at all of the mooring sites, and also carry out a CTD/LADCP/Microstructure survey.

3. We will collect underway data throughout the cruise (vessel-mounted ADCP, Knudsen, met sensors).

Additional Info

Pre-cruise Planning Meeting: Visit WHOI


Supporting documentation:

Notes: Please reference document titled "AR30-06 Precruise Agenda w Notes" for additional information provided during the Pre Cruise Meeting on May 29, 2018. 


Funding Agency: NSF
Grant or contract number: OCE-1259618

Scientific Instrumentation for R/V Armstrong

Shipboard Equipment

Bathymetry System 12 kHz
ADCP 300 kHz
Sippican XBT System (Mark 21)
Bathymetry System 3.5 kHz
ADCP 150 kHz
Science Underway Seawater System
12 kHz Pinger for Wire Use
EM122 (12 kHz) Multibeam Echosounder
EK80 Sonar
Dynamic Positioning System
K-Synch System
ADCP 38 kHz
EM710 MkII (40 to 100 kHz) Multibeam Echosounder

Shipboard Communication

Basic Internet access via HiSeasNet

CTD/Water Sampling

Wet Labs ECO-AFL fluorometer
Wet Labs C*Star transmissometer (660nm wavelength)
Seapoint STM turbidity sensor
SBE43 oxygen sensor
911+ Rosette 24-position, 10-liter bottle Rosette with dual T/C sensors
Biospherical underwater PAR (1000m depth limit) with reference Surface PAR
Wet Labs FLNTURTD Combination Flourometer and Turbidity Sensor

Critical CTD Sensors

We will attach 4 chipod sensors to the rosette. We need a complete backup CTD system.

CTD-Related Equipment

Lowered Acoustic Doppler Current Profiler (LADCP)

Hydrographic Analysis Equipment

Salt Bottles (2 cases of 125 ml provided)

MET Sensors

Barometric Pressure
Air temperature
Relative Humidity
Wind speed and direction
Short Wave Solar Radiation
Long Wave Solar Radiation
Storage Notes:


Navigation Notes:
Winch Notes:

Wire use and application

CTD Winch with .322" Electro-mechanical wire
Trawl Winch with 9/16th trawl wire
Winch Notes:

The trawl wire is necessary if we need to drag for any of the moorings.

Standard Oceanographic Cables

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

Special Requirements

Elecrical Power: no Identify 
Equipment Handling: yes Identify: Mooring Deployment
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?no
Describe deployment method and quantity:

Radioactive Material


Additional Information

Is night time work anticipated on this cruise?yes
Specialized tech support (Seabeam, coring, other):

SSSG Techs should be capable of running the acoustics for this cruise.

Other required equipment and special needs:

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: