HOT-10: Chief Scientist Report

Chief Scientist: S. CHISWELL

HOT-10 Cruise Report
SSP Kaimalino
21-24 Sep. 1989 



Personnel:

WOCE				GOFS
Steve Chiswell (C.S.)		Chris Winn		
Jef Snyder			Dale Hebel
Stewart Reid			John Dore
Shannon Cripe			Ricardo Letelier
Marc Rosen		
	 


Report

This cruise was made with a never-used cable with 6260 m of cable on
the drum. For the first time, we also used the crane and crutch to
launch the CTD.

Kahe Pt cast was made successfully to 1000m.

No science was done during the transit to the HOT site.

The sediment traps were deployed at first light on 21 September at 22'
43.1N, 157' 55.7W, and eventually retrieved on 24 September, 1989 at
22' 57.8N, 158' 17.8W, making almost 0.5 knots to the north-west.

An in-situ primary productivity array was deployed for 12 hours on 22
September.

The WOCE CTD casts were made for 33 hours. We had some problems with
lanyards catching on the rosette on initial casts. I think that many of
the bottles on the 4500m cast may have had lanyards caught. We tried
later to redo the 4500m cast, but had a connector fail at 3300m so this
2nd attempt was abandoned.

In situ natural fluorescence package was deployed on 21, 22, and 23
September. The package was deployed repeatedly on 22 September. The
software did not work properly, and we were unable to display all the
data at sea.

We also ran two intercomparison casts using the CTD with two
T-sensors.

XBT casts were made during thr transit homeward.


Cruise Summary

Station 1 - 1 cast
Station 2 - 15 CTD casts
          - 2 TTD casts
          - 1 primary productivity cast
          - 7 light casts



Hardware Problems:

One underwater connector failed; this may have given us some early
warning, when we got some 'ibcnt = -----' errors on station 1 cast 1

We kinked the cable once, requiring one mechanical termination


Software Problems:

Light package software does not work properly.