OCEANUS CRUISE SYNOPSIS


Voyage - Leg:OC 401
Voyage Dates:27 Apr - 06 May 2004
Chief Sci(s):John Toole (Toole)
Address: MS21
354 Clark
Phone:508-289-2531
Email:jtoole@whoi.edu
Cruise Objective:recover 1 mooring
deploy 5 moorings
deploy 6 United Kingdom Bottom Pressure Recorders (BPR)
occupy hydrographic section
Science Activities:Mooring deployment and recovery, CTD, ADCP,LADCP
Operations Area:Woods Hole to ~36.5N 67.5W
0:5000 m
SSSG Tech:sssg @oceanus.whoi.edu
Departure Port:Woods Hole, Massachusetts
Agent:Master R/V Oceanus
Attn: Scientist's Name
c/o WHOI
266 Woods Hole Rd.
Woods Hole, MA 02543

Contact: John Dyke
tel. (508) 289-3770
fax: (508) 457-2185
email: jdyke@whoi.edu
Arrival Port:Woods Hole, Massachusetts
Agent: Same as Above
Installed Scientific Equipment:12 kHz
Knudsen and EPC thermal recorder (replaces PDR)
Deionized Water
CTD/Rosette 24X10L Niskins - CTD/O2 critical sensors
Salinometer
Oxygen Titration Apparatus
ADCP
IMET
Pinger
WHOI-Provided Science Tools:Dual Workhorse LADCP
Gas Bottle Rack
Program-Provided Science Tools:Mooring Winch (440 VAC, 3-Phase) and Gear from WHOI Rigging Shop
Shipboard Equipment/Nav:A list of nominal CTD stations (more listed than we really have time to occupy, but...) The BPR (bottom pressure recorders) will be launched along this same line. (FYI, this line underlies the track of a satellite altimeter that samples sea level anomalies every 10 days on this line.)

CTD Stations
% latitud longiti depth
1 40 0.61 70 0.35 164
2 39 53.96 69 55.8 728
3 39 51.51 69 54.0 1154
4 39 47.45 69 51.09 1444
5 39 42.08 69 48.07 2079
6 39 28.52 69 38.51 2400
7 39 15.54 69 29.42 2635
8 39 0.94 69 19.95 3059
9 38 47.47 69 11.05 3253
10 38 33.52 69 1.52 3456
11 38 19.8 68 51.64 3814
12 38 5.42 68 41.99 4096
13 37 51.01 68 32.38 4363
14 37 37.28 68 22.58 4589
15 37 22.93 68 12.93 4746
16 37 8.34 68 3.61 4904
17 36 53.91 67 53.95 4933
18 36 39.5 67 44.41 4956
19 36 12.05 67 27.04 4989
20 35 42.64 67 9.74 5100
21 35 13.7 66 52.24 5093
22 34 44.41 66 34.78 5177
23 34 15.58 66 17.52 5216
24 33 47.1 65 59.71 5111

---------------
Mooring 1
---------------
Lat: 39 37 N
Lon: 69 43 W
Distance from first mooring: 0 km
Bottom Depth: 2200 m

MMP: 60 m to 2145 m
T/C sensors: 55, 2150 m
VACM: 2150 m
ADCP: None

annual replacement
---------
Mooring 2
---------
Lat: 39 15 N
Lon: 69 28 W
Distance from first mooring: 46 km
Bottom Depth: 2700m

MMP: None
T/C sensors: 1000, 1300, 1600, 1900, 2200, 2500, 2650 m
VACMs: 1000, 1600, 2200, 2650 m
Pressure: * *
ADCP: None

2-year deployments
---------------
Mooring 3
---------------
Lat: 38 54 N
Lon: 69 13 W
Distance from first mooring: 91 km
Bottom Depth: 3200 m

MMP: 60 to 3150 m
T/C sensor: 55, 3160 m
VACM: 3160 m
ADCP: None

annual replacement
---------------
Mooring 4
---------------
Lat: 38 29 N
Lon: 68 56 W
Distance from first mooring: 143 km
Bottom Depth: 3650 m

MMP: None
T/C sensors: 1000, 1300, 1600, 1900, 2200, 2650, 2900, 3200, 3600 m
VACMs: 1000, 1600, 2200, 2650, 3200 m
Pressure: * *
ADCP: 3600m

2-year deployment
---------------
Mooring 5
---------------
Lat: 38 11 N
Lon: 68 43 W
Distance from first mooring: 181 km
Bottom Depth: 4100 m

MMP: 1000 to 4050 m
T/C sensor: 1000, 4060 m
VACMs: 1000, 4060 m
Pressure: *
ADCP: None

annual replacement
--------------------------------------------------
Total instrument inventory in the field at any one time:

current meters: 13 (5 w/pressure)
bottom adcp: 1
MMP's: 3
T/C sensors: 22
----------------------------------------------------------

The mooring we will be recovering was deployed from the R/C Connecticutt on June 3, 2003. Mooring position is 39d 3.8 N, 69d 20.6 W. It is identical to Mooring #3 of the new deployments.

We will nominally be doing mooring work in the daytime and CTD work at night until the moorings are all completed. Scott requested that we deploy the first two or three new moorings at least, before going for the recovery. We'll probably play that by ear once we're out there. After the moorings are done, we'll proceed south along the track doing CTD stations, and go as far as we can before Larry says we have to head back to the barn. Ideally we'll get across the Gulf Stream. Heading home, I will want to run back along the same track as far north as the shelf break to acquire more SADCP data on our line.

We realize we have a very ambitious plan, but hopefully we'll get it all done. To help insure we do so, We'd like to push on nominal departure/arrival times if possible.
Other Requirements:Expect to load mooring gear on Monday 26 April. Only loading on Friday 23 April ("IF" Reddy cruise if offloaded and crew able) would be Gas Bottles from Lamont and anything else at crew's discretion.
Notes:We will have significant deck load due to all the mooring components and gear. Scott Worrilow - mooring contact. Rag Top Van and Dragging Gear stored on 01 Deck. All other gear on Main Deck.

Total estimated Deck load is 74500# this includes 2000# for UK gear and my 8000 hardware.

BPR Deployment - Scientist's from United Kingdom

Will need 220 V supply at their location in Main Lab

We will be deploying 6 Bottom Pressure Recorder (BPR) instruments, but would like to have a test deployment and recovery in fairly deep water before hand. The first BPR will go in at the 1800m isobath, and the others at your mooring sites. The instruments are small, self-contained units and will need a crane or A-frame and rope to winch them over the back (or side), and we have a simple release hook to drop them into the water. They should then sink to the bottom at about 1 m/s. If convenient, we would like to follow them to the bottom using the acoustic transponder - certainly for the first deployment. A quiet acoustic environment would be a advantage, particularly for the test deployment and recovery.

CFC Group from Lamont

If the gas cylinders could be loaded on the afternoon of April 23, that would work great for us. We will have10 tanks delivered to WHOI, 7 tanks of carbon dioxide and 3 tanks of nitrogen, so the 12 bottle rack will work fine. In the past we have had the carbon dioxide tanks located adjacent to the main lab bulkhead on the starboard side. We then ran a gas line from the CO2 tank in use into the main lab and when a new tank was needed, simply reconnected this gas line to another tank. We will need the nitrogen in the main lab near our equipment. So when the tanks are loaded on, if 2 of the nitrogen tanks could be placed in the main lab, that would be great. We will secure them in an appropriate location when we set up over the weekend.

Recovery of Breck Owens Gliders a possibility if problems with Gliders appear - Oceanus recovering these gliders is a contingency plan only. Would require use of ship's zodiac.
Navy Clearance Status:
Last Modified: 12/13/2006

Check List:Required?Comments
US Customs FormNo
Explosives ClearanceNo
Isotope Use ApprovalNo
Diplomatic ClearanceNo
SCUBA DivingNo