Ly 
(3) rate of decay of ambient noise from shallow to deep 
water. On the other two surveys, the LITTLEHALES will con- 
duct shallow-water current studies along the east coast of 
Andros Island and on the shallow banks between Tongue of 
the Ocean and Exuma Sound. 
The TANNER and REQUISITE (NOO) will run hydrographic 
surveys in the Windward Passage. About 360 ship-days will 
be required. Position control will be by LORAC. When 
LORAC reception is poor (during several hours each night 
in this area) oceanographic observations will be made in 
the Windward Passage area. 
The SAN PABLO (NOO) will be running oceanographic sur- 
veys to collect environmental data for long-range SONARS. 
The area of Atlantic operation has not been finally de- 
termined, but data will be obtained on bottom reflectivity, 
bottom geologic structure and acoustic properties, bottom 
sediments and topography, plus observations and measurements 
with standard Nansen casts, sound velocimeters, and bio- 
logical tows and trawls. 
The Coast Guard Cutter CASCO has been equipped for 
oceanographic operations and will make pilot trips in the 
North Atlantic starting in late January while assigned to 
Ocean Station Echo (35°00'N, 48000'W) and continued on 
Ocean Station Delta (44°00'N, 41°00'W) in April. Based on 
these trial runs on the CASCO, additional outfitting of 
