ERRORS: 

 SHIP-TO-SHORE 

 SHIP-TO-SMALL-BOAT 

 SMALL-BOAT-TO-SUB 

 SUB DEPTH 



SMALL BOAT 



HORIZONTAL 



RANGE AND BEARING 



•"^^r: 



^4/V, 



Gf" 



-^ 



STAR III 



POSITION COIMTROL 

 Fig. 10.16 STAR Ill's tracking and position control. 



The lost array consisted of a 3,600-foot 

 nylon line with a release mechanism and five 

 current meters attached in tandem. The 

 depth was 3,150 feet and the surface location 

 had been accurately fixed by bearings on 

 shore when the loss occurred. ALUMINAUT 

 was equipped with a 37-kHz pinger (which 

 produced relative bearings to a line hydro- 

 phone on the surface ship) and an underwa- 

 ter telephone to provide both range and com- 

 munications. A CTFM Sonar on ALUMI- 



NAUT was to be used to "home in" on another 

 37-kHz pinger which was dropped by the 

 support ship (PRIVATEER) on the array's 

 last fix and suspended off the bottom by a 

 buoy. 



Reaching the bottom at 3,200 feet ALUMI- 

 NAUT was trimmed, given a course to the 

 pinger by PRIVATEER and proceeded along 

 on its wheels. At first, the CTFM sonar inter- 

 mittently picked up the pinger but then lost 

 the ability to train (rotate). The pilot was 



499 



