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SOUTHERN GRID 
PRELIMINARY REPORT AT-SEA SURVEY NO. 9 
lU-19 August 1966 
This report is based upon the observations and collections made within the 
Southern Grid area during the period lli-19 August 1966* The cruise track for 
the present survey was similar to that followed during July 1966.(Figure l). 
This type of grid pattern is quite suitable when mass banding and streamering 
operations are being carried out on Howland in that the maximum results can be 
obtained from both the island and at-sea work with the limited time and man-power 
available* When Sooty Terns are not breeding on Howland and only a brief survey 
of the island is needed, aryj? entirely different grid pattern is recommended* 
Since only approximately half the time as that allowed during the July survey 
was available for August grid work, the present survey was not nearly as adequate. 
An attempt was made, however, to cover as much area as time permitted in all 
major directions out from Howland* 
The Smithsonian survey party included Richard Grossin (Biologist in Charge), 
Roger Clapp, Kenneth Balcomb, Walter Bulmer, David Hoff, Richard Chandler, Lariy 
Huber, and David Pearson. The grid cruise was made aboard the U*S.N.S. SHEARWATER 
(T-AG 177). Some misunderstanding by the Master concerning operational procedure 
during grid survey work occurred, but did not affect the results of the present 
cruise* 
Diurnal operations were maintained from sunrise to sunset, except during 
island operations* During the grid period a total of 53U miles and 6U hours of 
diurnal observations were completed (Table 1)* A total of k09$ birds of 20 species 
