HOT-35: Chief Scientist Report

Chief Scientist: S. CHISWELL

HOT-35 Cruise Report
All times are in Hawaii Standard Time

3 March 1992
------------
1000 R/V Wecoma left Snug Harbor.

1200 Arrived at Kahe Pt. A weight test of the hydro winch was made, a
PNF cast was done, and a 1000 m CTD cast was made; all without
significant problems. However, the computer Hookipa seems to have a
problem with the printer port, as it would not send line feeds to the
printer. This problem was solved after Station 1, cast 1, by swapping
the CTD data acquisition computer with its backup.

2230 Arrival at IES site #5. This IES responded to all acoustic signals
properly, and was commanded to release itself at 0005.

4 March
--------
0023 IES #5 left the bottom, and arrived at the surface at 0145. There
was no strobe or radio signal. After a 1-hour search, the IES was
sighted at 0245, and recovered by 0305. The strobe/radio glass sphere
had water in -- hence the absence of strobe and RDF signal.

0700 The sediment traps were deployed without incident.

0858 Arrival at IES site #4. The release command was sent at 1006, and
the IES recovered at 1145. Its strobe was also flooded. Based on this,
it was decided to adjust the cruise schedule so that all IES recoveries
would be done in daylight.

1315 Arrival at IES site #2. A PNF cast was done before the IES
recovery. The release code was sent at 1428, and the IES was recovered
by 1620.

1636 Station 2, cast 1 was started: 1000-m cast. There was noisy data
on the Morita sensor, and its cable was changed.

1945 Station 2, cast 2 was started: 1000-m cast. The Morita trace was
less noisy, but still not completely clean.

2216 Station 2, cast 3 was started: 1000-m cast.

5 March
-------
0130 The go-flo cast for primary productivty was started.

0245 Station 2, cast 4 was started: 1000-m cast.

0400 The primary productivity array deployment was started.

0626 Station 2, cast 5 was started: 1000-m cast.

0910 Station 2, cast 6 was started: 4500-m  WOCE cast.

1530 Station 2, cast 7 was started: 1000-m WOCE cast. At the end of
this cast, the printer was turned off prematurely; consequently the
mark file was not properly written. It was recovered, and given a non-
standard name to flag this event to the processing.

1830 Recovery of the primary productivity array was started.  Since we
had not got any good ARGOS fixes, and there was no sign of the sediment
trap on the RDF, we decided to locate the traps and get a GPS fix for
them. They were found at 2100, 25 miles to the south east of Station
2.

2300 Station 2, cast 8 was started: 1000-m cast.

6 March
-------
0200 Station 2, cast 9 was started: 1000-m cast.

0430 Station 2, cast 10 was started: 1000-m cast. During this cast,
logging was accidently terminated at the bottom. The upcast was
labelled station 2, cast 11.

0700 Arrival at IES #4 site. The  IES was recovered, and on deck by
0932.

1015 Station 2, cast 12 was started. This was the first deep oxygen
cast for the Morita. It was completed by 1400.

1540 Arrival at IES site #1. The IES was recovered, and on deck by
1740.

2020 Station 3, cast 1 was started: second deep oxygen cast for the
Morita. During this cast, the overflow light on the SeaBird deck box
came on. This overflow apparently caused a delay between the plot on
the screen and the package. Probable cause was that the printer got
turned on with `letter quality mode'.

7 March
-------
0230 Station 3, cast 2 was started: 1000-m cast. During this cast, it
was noticed that the date on the screen was 6-March, even though the
computer was set to 7-March (checked by the date command from DOS).

0400 Commencement of XBT transect south.

1100 Sediment traps recovered without incident.

1540 Station 4, cast 1 was started.

1725 Station 5, cast 1 was started.