Jeff Grevert, June 15, 2005

NOAA Teacher at Sea
Jeff Grevert
Onboard NOAA Ship Delaware II
June 8 – 16, 2005

Mission: Surf Clam Survey
Geographical Area: New England
Date: June 15, 2005

The dredge

The dredge

Weather Data

Latitude: 41° 12′ N
Longitude: 070° 45′ W
Visibility: 2 nm
Wind Direction: 220°
Wind Speed: 13 kts.
Sea Wave Height: 2 ft.
Swell Wave Height: 2 ft.
Sea Water Temp.: 13.3° C
Sea Level Pressure: 1007.9 mb
Cloud Cover: 5/8 (Altocumulus, Cirrus)

Science and Technology Log

0000- 0600: After one successful trawl, an electrical component on the dredge lost power. During the next four hours, scientists and engineers dismantled the component and realized that it had a leak which allowed water to enter. The component was most likely damaged when the dredge was dragged over rocks yesterday. The component was repaired by the end of my watch. We then went off watch and ate dinner. When I awoke for my next watch, I learned that the next watch (0600-1200) also experienced power loss to the component.  Again it had to be dismantled and repaired.

1200-1800 The dredge and all components worked smoothly for my second watch.  Our trawls yielded few clams however.  One trawl filled the dredge with nothing but benthic sediment.  After being relieved by the next watch I ate dinner and went to work on lesson plans and interviews.


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