HOT-211 Chief Scientist Daily Reports

Operations at Kahe station were completed with a slight delay due
to a computer failure. Operations at ALOHA station continue with some
delay due to a late arrival. Currently we are only 1/2 hour behind
schedule. One 1000-m CTD cast was conducted at Kahe station; one 200-
one 100-m, one deep and two 1000-m CTD casts have been conducted at
ALOHA station. The following is a detailed account of the activities

26 May 2009
Hour (HST) Activity
0900 Departed from Snug harbor
0930 Abandon ship and fire drills, followed by safety briefing
and science meeting
1200 Arrived at Kahe Station. 400 lb weight cast to 500 m
1300 PRR cast
1330 Hyperpro cast
1440 Station 1 Cast 1. Problems with acquisition computer. Switched
to backup computer

27 May 2009
Hour (HST) Activity
0145 Arrived at ALOHA station
0237 Deployed sediment traps at 22 42.12'N, 158 0.75'W
0311 Station 2 cast 1 to 200-m
0500 Deployed primary productivity array at 22 43'N, 158 0.2'W
0522 Station 2 cast 2 to 100-m
0620 Station 2 cast 3, deep cast
1015 Net tow
1140 Station 2 cast 4, 1000-m
1345 Net tow
1431 Station 2 cast 5, 1000-m

Fernando Santiago-Mandujano
HOT-211 Chief Scientist
1530, 5/27/09
R/V K-O-K

HOT-211 Day 2 Report

Operations at ALOHA station continued back on schedule with a half hour
delay in our last CTD cast. Eight 1000-m CTD casts have been conducted at
ALOHA station since the last report. The primary production array was
successfully recovered, and the gas array was deployed. The PRR, Hyperpro
and AC9 casts have been conducted through the A-frame. A successful PRR cast
was conducted after two unsuccessful attempts, during the first one the PRR drifted
away from the ship due to a surface current, and during the second the PRR tilted from
its vertical position.

The A-frame performance has been marginal due to a hydrolic fluid leak through
a broken gasket. It has been possible to continue using the A-frame by
turning it on and off between operations.

Winds have turned from NNE at 7 Kt with clear sky and smooth seas

The following is a detailed account of the activities

27 May 2009
Hour (HST) Activity
1655 Station 2 cast 6, 1000-m
1900 Recovered primary productivity array at 22 41.7'N, 158 2.09'W
2006 Station 2 cast 7, 1000-m
2200 Net tow
2300 Station 2 cast 8, deep cast

28 May 2009
0100 Net tow
0205 Station 2 cast 9, 1000-m
0420 Deployed Gas array at 22 43.64'N, 158 0.08'W
0450 Station 2 cast 10, 1000-m
0700 ATE sample taken
0756 Station 2 cast 11, 1000-m
1015 Net tow
1100 Station 2 cast 12, 1000-m
1220 PRR cast
1310 Hyperpro cast
1345 AC9 cast
1435 Station 2 cast 13, 1000-m

Fernando Santiago-Mandujano
HOT-211 Chief Scientist
1540, 5/28/09
R/V K-O-K

Operations continue at ALOHA station and station 50. Two 1000-m, one deep and
one 200-m yo-yo CTD casts have been conducted since the last report.
The sediment traps and the gas arrays were successfully recovered.
The PRR cast scheduled for today could not be conducted because the
PRR's dedicated computer crashed. The two sediment traps moorings were
successfully deployed NNE from ALOHA, outside the circle. We are currently
conducting a triangulation of both of them.

Winds are easterlies at 9 Kt.

The following is a detailed account of the activities

28 May 2009
Hour (HST) Activity
1700 Station 2 cast 14, 1000-m
2004 Station 2 cast 15, 1000-m
2200 Net tow
2300 Station 2 cast 16, deep cast

29 May 2009

0440 Recovered sediment traps array at 22 37.6'N, 158 5.28'W
0600 Recovered Gas array at 22 40.0'N, 158 3.06'W
0830 Station 50 cast 1, 200-m yo-yo cast, 200-m from WHOTS buoy
1005 AC9 cast
1100 AC9 cast
1237 PRR's computer crashed before PRR cast. Unable to deploy.
1438 Deployed Sediment Traps Mooring 14, 22 51.744'N, 157 55.12'W
1602 Deployed Sediment Traps Mooring 15, 22 51.801'N, 157 53.319'W

Fernando Santiago-Mandujano
HOT-211 Chief Scientist
1630, 5/29/09
R/V K-O-K

 


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This material is based upon work supported by the National Science Foundation under Grant No. OCE 9303094, 9811921, 0117919, and 0327513. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the NSF.