SOUTHERN GRID 
PRELIMINARY REPORT AT-SEA SURVEY NO. 12 
18-21 November 1966 
This report is based upon the observations and collections 
made within the Southern Grid during the period 18-21 November 
1966* Considerable I 06 S- of time at Johnston Atoll for ship repair 
* 
necessitated a shortened grid survey* Attempts were made to cover 
as much area in all major directions from the central islands- as 
possible during the time available* Distal .portions of the east 
and northeast sectors were not adequately covered by diurnal ob- 
servations (see Figure 1)» 
* S 
The Smithsonian survey party included Richard Crossin (Biol- 
g~st an Charge) f Dr* Robert Pyle, Kenneth Balcomb, Richard Chandler 
• # 
Lawrence Huber, John Fitch, Richard Heiden, Chris Thompson, and 
Robert Tuxson* The grid cruise was made aboard the U.S.N.S. 
SHEARWATER (T-AG 177)* Excellent cooperation and assistance were 
received from the officers and crew members* 
Diurnal observations were maintained from sunrise to sunset, 
except during the process of unloading and picking up personnel 
and equipment at Howland and Baker Islands* During the grid sur- r 
vey a total of 407 miles and 43 hours of diurnal observations was 
completed (Table 1). During this period 2,568 birds of 22 species 
