Amerson, B. 1963 C. G. Loran Station, Sand Island, Johnston Island Atoll July 7, 1963 Left Hickam AFB at 7:10 a.m. via MATS flight N33 bound for Johnston Island. Arrived 10:10 a.m. and checked in, etc. Moved to Sand Island at 1 p.m. C. O. of the Loran C. G. Station is Lt., (Jg) W. H. Hayes. We were quartered in the C. P. O.'s unit which are quite nice. After eating a light snack we unpacked our gear and personal items. We then walked around the island to see what birds were present. Sand Island is "dumbell" shaped with the Loran Living Quarters, Buildings, etc. at one end and the antenna and birds at the other end. The two ends are connected by a man- made causeway. The east end is approximately 800 feet by 500 feet and is covered with low grass and Puncture Plants. Approximately 200,000 Sooty Terns are on the island most of which have flying young. A few Gray-backed Terns (50+) are present but only one or two are nesting. Common Noddies (1000+) are nesting also and have eggs, and chicks and large chicks. Many came in at night and roosted on the low ends of the antenna guywires. A few Hawaiian Noddies are nesting also. About twenty pairs of Brown Boobies are nesting with eggs to flying young. Five Red-footed Boobies are nesting. No Masked Boobies have been seen. At night about 250+ Red-footed Boobies come in to roost but most are either on the guywires (up to 100+ on a single wire) on the rocks off shore. Ten to fifteen Frigate birds are nesting (eggs to lg young). No Masked Boobies have been seen. At night