Power, not only for the recorder or monitor, 

 but for the transducer as well. Additionally, 

 sonic devices are more complex than pres- 

 sure sensors, heavier and larger. Figure 

 10.13 shows examples of both pressure gage 

 and sonic depth recording devices on sub- 



mersibles and also includes other indicators 

 found in current submersibles. 



Altitude — By altitude is meant distance-off- 

 the-bottom, and this information is used dur- 

 ing descent so that the operator can reduce 

 his speed to a safe level upon approaching 



Fig 10.13 Various indicators and equipments aboard Sf-Afl /// (Gen Dyn Corp) 



485 



