AT SEA SURVEY 18 JANUARY 1965 
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The 18th At Sea Survey was conducted from U-18 January with four 
Smithsonian Institution personnel aboard - Charles Sly (Biologist in 
Charge), Kenneth Amerman, Roger Clapp and Dgyie Husted. Observations 
were made during all daylight hours both en route to and from the Ori<i 
and within the Grid proper. Nocturnal observations were made for nine 
nights including areas both inside and outside the Grid. 
The trip plan was modified in several ways from previous cruises. 
Details are presented in the Trip Report. The usual two man, two nour 
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watch was used at the beginning of the cruise but so few birds were 
recorded that less formal watches were maintained for the remainder of 
the trip* At least one man was constantly on watch* Nocturnal observations 
were made with one man, three hour watches. No oceanographers were aboard 
and no BT casts were taken. The Field Party members prepared about 80 
birds left frozen from previous trips - 56 were stuffed before supplies 
were exhausted. Cooperation from the ship was very good; shooting was 
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rarely restricted* and the whaleboat was lowered for three hours near 
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Johnston Island for collecting and distance measurement experiments. 
Six and one half days were spent within the Grid; eight and one half 
days en route (Table l). Diurnal observations were conducted for a total 
of 75 hours (150 man hours) and 688 linear miles within the Grid and 8 
total of 92.8 hours (l85.6 man hours) and 763 linear miles outside the Grid. 
Nocturnal observations totalled 50.9 hours and U66 miles inside the Grid 
and 60.3 hours and 555 miles outside the Grid. Additional details of 
mileage and time logged are in T a bles 1 and 2. 
