Anchors: 



Very few submersibles carry anchors. Ad- 

 mittedly, their use from a surfaced submers- 

 ible in the deep sea is impractical, if not 

 physically impossible. However, a great deal 

 of submersible work is performed not far 

 from shore where separation from the sup- 

 port craft may place it in a position of drift- 

 ing into shoal water before assistance can 

 arrive. A number of the devices discussed 

 above are shown in Figure 14.12 aboard B£iV 

 FRAMU^m prior to its 30-day drift. 



Life Rafts: 



The French SP-3000 carries a 1-man life 

 raft for each of its three crew members and 

 Westinghouse Corporation's DS-2000 car- 

 ries a 3-man life raft (Fig. 14.13); both are 

 inflatable either manually or automatically. 



Breathing Gasses Expired 



Several situations can occur whereby a 

 surfaced submersible may find it necessary 

 to flush out its cabin air or obtain additional 

 breathing gasses: 1) Where the vehicle has 

 lost all contact with surface support and is 

 adrift sufficiently long to exhaust its life 

 support system; 2) where sea state does not 

 permit retrieval and the vehicle must be 

 towed a long distance; and 3) where the 

 normal cabin air has been contaminated. An 

 obvious solution entails merely opening the 

 hatch and flushing out the cabin. In the vast 

 majority of submersibles this solution is pos- 

 sible, but it is limited by sea state. Protective 

 fairings or sails around the hatch of many 

 submersibles extend 3 or 4 feet above the 

 waterline and afford protection from swamp- 



SURFACE RADIO 

 ANTENNA 



FLASHING 

 LIGHT 



360° SCAN 

 TV CAMERA 



•,^,>^--W ^jI. '■ MARKER 4 KHZ TRACKING 



V ^S»JJi' - "vi '^ ""^ >. ''6 ^^^ TRACKING 



* ^; -■* <-^'^^.jf\^ ^ TRANSPONDER 



OBSTACLE AVOIDANCE 

 SONAR (CTFM 



ANCHOR 





Fig 14 12 Various emergency preventive and corrective devices aboard BEN FRANKLIN (Grumman Aerospace Corp ) 



672 



