SIC 12 PRELIMINARY REPORT AT-SEA SURVEY 
29 March to 21 May 
19 66 
NON-GRID ONLY 
This report covers the observations and collections made at 
sea by POBSP personnel on the Southern Island Cruise # 12 during 
the period 29 March through 21 May 1966. During this period 279.6 
hours of diurnal observations and 2732 milws were covered. A total 
of 1720? birds of 40 species were recorded and 65 birds represent¬ 
ing 10 species were collected (Tables 1 & 3). Nocturnal observations 
south of Johnston Atoll amounted to 156 miles and 14.8 hours. A to¬ 
ts! of 83 birds of 6 species were recorded (see Northern Grid report) 
The Smithsonian POBSP team consisted of Richard S. Crossin 
(in charge of at-sea operations)* Max C. Thoppson (in charge of is- 
lands-lst half), Dayle Husted, Norman Heryford, James Lewis, Brian 
Harrington, Ken Balcorab, Prank Smith, Dave Hoff, Phil Shelton (1st 
half) and Jeff Tordoff (2nd half). The SIC 12 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. 
The SIC 1? cruise track was essentially the same as those 
as those followed during SIC 9 and SIC 11 (Figures 1 & 2). For 
purposes of comparing the avifauna during these three cruises, 
the trade can be divided into three sections comparable to that 
used in both the SIC 9 & 11 reports as follows: 
