Preliminary Report Eastern Area Cruise No. 24 11-22 September, 1967 including Eastern Grid Survey No. 13 Prepared by Richard D. Chandler Cruise Itinerary: 11 September 1000 - Depart San Diego 12 September 1700 - Enter Grid at Point "Ash" 21 September 1430 - Depart Grid at 35°00'N; 122°50'W. 22 September 1300 - Arrive Alameda (Times: +7 - Tango) Survey Personnel: Robert DeLong (Biologist-in-charge), Dr. Robert Pyle, Richard Chandler Methods: One and/or two man diurnal observations were made from the helicopter deck when weather conditions permitted. During high seas, rain, or high wind (less than 10 percent of the diurnal hours) the watch was held from the lee wing of the bridge. Nocturnal watches were held on the lee quarter deck. Birds were collected from the skiff on 13 September. Several birds were shot as they attempted to rest or land on deck. B-T casts were made at 2-hour intervals from 0400-1800 and at 2400. Other methods and procedures followed those established on previous cruises. Cruise Track: (see photo-reproduction and Figure #1). Curious observations taken on the afternoon of 11 September northwest of San Diego are the first taken over this track but may be compared to the winter observations on EAC #1. The Non-grid portion of the 12th of September approached to within 25 miles of the grid area (Point Dogwood) and, since the grid track around points "D" and "E" was traversed at night, are useful in inter- preting the actual grid date. (See particularly Sooty Shearwater). The nominal grid track was covered with the exception of 20 miles of the southwest corner and the 20+ miles west of Point Oak. Portions of two days, 20 and 21 September, were spent in the grid but not on the nominal tack. These non-track sections have been combined