Chapter 8 — COMMUNICATIONS 



her position. A yellow flare or smoke signifies 

 the submarine intends to surface. Ships must 

 then clear the area and keep other shipping 

 away, A designated ship notifies the submarine 

 that the signal was sighted, and informs him 

 when it is safe to surface. A red flare denotes 

 trouble. It means the subm;iTine is carrying 

 out emergency surfacing procedures. If the flares 

 are repeated, or if the submarine fails to surface 

 within a reasonable length of time, it can be 

 assumed he is disabled and requires immediate 



assistance. You must make every effort to 

 maintain sonar contact and establish commimica- 

 tions by any means possible, bat preferably 

 by voice. 



Detailed pyrotechnic, sonar, and explosive 

 signal Information is contained in FXP 1. All 

 Sonar Technicians must become familiar with 

 the signals in that publication. The rescue of 

 a disabled submarine's crew could depend on 

 your ability to establish and maintain reliable 

 communications. 



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