PRIMER / Coastal Mixing & Optics (ONR-sponsored)

R/V Oceanus--Voyage #288 Sept 25-28, 1996
submitted by Murray Levine, Chief Scientist

The cruise was short, action-packed and successful. Five
independent groups worked together to perform a variety of
mooring operations:

Levine/Boyd--mooring recovery--CTD survey
Dickey--mooring deployment
Agrawal--tripod recovery and redeployment
Williams--tripod recovery
Lentz/Plueddemann--mooring resetting and maintenance

The success and good spirit of the cruise was in no small part due
to the exceptional weather. The full lunar eclipse was an added
bonus. Many thanks to the crew of the Oceanus for their
professionalism, patience, and sense of humor.

I. Recovered Renegade Mooring -- Inshore Surface Toroid
Mooring (Lentz)
A. Tracked from Argos position--found at 2025 UT 25
Sept at 40 deg 23.75'N;
71 deg 37.34'W--about 50 n. miles from the Central site
B. Entire mooring from the release up was recovered
without incident
C. Redeployed with new release--1515 UT 26 Sept at
40 deg 35.00'N; 70 deg 27.50' W

II. Recovered OSU MAIN-- 1740 UT 26 Sept -- 40 deg 29.50' N;
70 deg 30.46'W
A. Taut subsurface mooring with tethered surface marker
buoy (radar reflector & flashing light)
B. Instrumentation: Temperature recorders (15), T-C
Seacats (5), Doppler profiler ( RDI ADCP), Rotor current
meters (2), Dickey's BIOPS (3), acoustic release

III. Recovered OSU MET-- 1900 UT 26 Sept -- 40 deg 29.37'N;
70 deg 30.64'W
A. Surface buoy with meteorological mast, radar reflector
& flashing light
B. Instrumentation: Temperature recorders (5); Doppler
profiler (Sontek ADP); Air temp, barometer, wind velocity,
humidity, insolation, acoustic release

IV. Deployed Sea Tex waverider buoy-- 2020 UT 26 Sept
A. Reattached buoy to existing tether

V. Recovered Agrawal Tripod-- 2120 UT 26 Sept

VI. Recovered AUXILLARY-- 2245 UT 26 Sept --
40 deg 29.38'N; 70 deg 30.46'W
A. Surface buoy with radar reflector and flashing light
B. Instrumentation: Temperature recorders (5)

VII. Deployed South Guard (central site)-1405 UT 27 Sep--
40 deg 29.26'N; 70 deg 30.60'W
A. Surface buoy with radar reflector and flashing light--no
instrumentation; no release

VIII. Deployed Dickey Mooring-- 1540 UT 27 Sep --
40 deg 29.37'N; 70 deg 30.50'W
A. Subsurface mooring; no surface expression
B. Instrumentation: BIOPS (3), Doppler Profiler (RDI),
T-C Seacats (3), T-pods (11), release
C. Flashing light on deployed mooring sighted evening of
27 Sept at 40 deg 29.319'N, 70 deg 30.557'W

IX. Deployed Fan Beam Doppler -- 1650 UT 27 Sep --
40 deg 29.50'N; 70 deg 30.60'W
A. Subsurface float with ADCP inside; no surface
expression

X. Recover Williams/Trowbridge Tripod-- 2200 UT 27 Sept
A. Line broke on first attempt
B. Second line required skilled handling to bring aboard--
muddy feet
C. Instrumentation: BASS (Benthic Acoustic Stress
Sensors) (7), T-C SeaBird (2), Acoustic Doppler
Velocimeters (3) (Sontek), camera

XI. Deploy Agrawal Tripod -- 2230 UT 27 Sept--40 deg 29.32'N;
70 deg 30.32'W
A. Instrumentation: Floc camera assembly (P. Hill),
LISST-100 (Laser In-Situ Scattering Transmissometry;
Sequoia Scientific; C. Pottsmith, Y. Agrawal),
BIOPS (T. Dickey)

XII. Miscellaneous Tasks
A. Visual check of Central Discus buoy with met station
B. Visited Offshore Toroid met station and replaced
propeller assembly
C. Collected water samples before leaving the area--Dickey

XIII. Vertical profiles with CTD (SBE 25) with transmissometer
A. North-south transect along 70 deg 30'W with sampling
to 80% of depth or 200 m

Station Latitude, N Water depth,m
#1     40 deg 54'         51
#2     40 deg 49'         52
#3     40 deg 44'         54
#4     40 deg 39'         59
#5     40 deg 34'         63
#6     40 deg 29'         70
#7     40 deg 24'         80
#8     40 deg 19'         95
#9     40 deg 14'         115
#10     40 deg 09'         121
#11     40 deg 04'         180
#12     39 deg 59'           625
#13     39 deg 54'         1050

B. Closely spaced casts around fronts between stations #7
and #12.

XIV. Scientific Party
OSU -- Murray Levine, Timothy Boyd, Walt Waldorf,
Kieran O'Driscoll, Jose de Bettencourt
UCSB -- Tommy Dickey, Derek Manov, Joseph McNeil
WHOI -- William Ostrom, Bryan Way, Allan Gordon,
Gary Stanbrough
Dalhousie -- Paul Hill
Sequoia -- Charles Pottsmith
SSSG Tech -- Erich Horgan