EASTERN GRID SURVEY NO. 11, EAC 20 
Survey Itinerary: 
07 August 
1000 
Depart Long Beach 
t 08 August 
0900 
Enter Eastern Grid at Point "ASH" 
1 6 August 
1215 
Depart Eastern Grid at Point "Oak 
17 August 
1300 
# 
Arrive Long Beach 
Survey Personnel: Robert L. DeLong (BFC), Richard D. Chandler and 
David I. Hoff. 
Support Vessel: USS Granville S Hall, AG ^0 
* 
The excellent coverage obtained in this grid survey characterizes 
the fine cooperation extended by officers and crew of the Hall . 
Methods: 
Complete diurnal observations were taken while in the grid area. 
Nocturnal observations were limited to a few hours each night in the 
grid. Nine hours of laying-to time have been incorporated in the grid 
schedule. During this survey these hours were used to experiment with 
methods of capturing birds at night. A mist net and search lights were 
used with only mild success on one night. Subsequent, attempts at mist 
netting were hampered by the full moon which illuminated the ship so that 
the search lamps had little effect. In addition a thirty foot piece of 
white material was rigged in one of the exposed passageways on the main 
deck and illuminated with search lights. This failed to attract birds, 
presumably due to bright moon conditions. 
The whaler was used for collecting on two days while in the grid. 
Generally choppy seas prevented its further use. 
Data handling has been modified during this survey in an attempt to 
simplify processing of these data. A chart of the nominal grid track has 
