Woods Hole Oceanographic Institution

Cruise Planning Synopsis

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AR30-04: Johns "OSNAP East"


RV Neil Armstrong

Cruise Party

William JOhns: Chief Scientist, Principal Investigator
RSMAS, University of MIami 4600 Rickenbacker Causeway Miami, FL USA 33149
+1 305 421 4054

Departure: Jul 1, 2018


Arrival: Jul 30, 2018


Operations Area

North Atlantic range: 58-60deg N and 8-35deg W.
Lat/Lon: 58° 0.0′ N / 33° 0.0′ W
Depth Range: 1200 / 3500
Will the vessel be operating within 200 NM of a foreign country? United Kingdom
Are visas or special travel documents required? no

Science Objectives

This research is part of the U.S. led "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.  Scientists from the U.S., the U.K., and the Netherlands will participate in this cruise.

The specific objectives of this cruise are as follows:

  1. To perform mooring operations along the OSNAP East line between Scotland and Greenland, including servicing (recovery and redeployment) of 15 current meter moorings, recovery of two current meter moorings and 3 sound source moorings, and deployment of 4 additional current meter moorings.
  2. To conduct standard CTD (Conductivity-Temperature-Depth) and Lowered ADCP (Acoustic Doppler Current Profiler) stations at selected sites along the same mooring line.
  3. To recover and deploy ocean gliders, as needed, along the section. 

Science Activities

In addition to the above, limited Seabeam surveying will be done to help site a mooring on the western flank of Hatton Bank, near 57 48'N 19 06'W.

Additional Info

Pre-cruise Planning Meeting: Teleconference


Supporting documentation:



Funding Agency: NSF
Grant or contract number: OCE1332978

Scientific Instrumentation for R/V Armstrong

Shipboard Equipment

12 kHz Pinger for Wire Use
ADCP 150 kHz
ADCP 300 kHz
ADCP 38 kHz
Bathymetry System 12 kHz
Deionized Water System
Dynamic Positioning System
EK80 Sonar
EM122 (12 kHz) Multibeam Echosounder
Science Underway Seawater System

Shipboard Communication

Basic Internet access via HiSeasNet

CTD/Water Sampling

911+ Rosette 24-position, 10-liter bottle Rosette with dual T/C sensors
SBE43 oxygen sensor
Wet Labs C*Star transmissometer (660nm wavelength)
Wet Labs FLNTURTD Combination Flourometer and Turbidity Sensor

Critical CTD Sensors

CTD-Related Equipment

Lowered Acoustic Doppler Current Profiler (LADCP)

Hydrographic Analysis Equipment

Dissolved Oxygen Titration System (Brinkmann Titrator)
Oxygen Sample Bottles (available in 150 ml sizes)
Salt Bottles (2 cases of 125 ml provided)

MET Sensors

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

Sample Storage

Freezer -70°C 25 cu. ft.
Freezer -70°C 3.2 cu. ft. ea.
Storage Notes: nutrient sample bottles


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:


UNOLS Winch Pool
Winch Notes: Lebus Winch
Winch Notes:

Standard Oceanographic Cables

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

Portable Vans

Hydrographic Van

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: yes Identify Lebus winch
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:

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:

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: