Fig 3 24 Now a sludent training aid, DOWB was the only submersible to relinquish 

 viewports in favor of fiber-optics. (Gen. Motors Inc ) 



stalled; one looked forward and one down- 

 ward. Separate images for two observers 

 were provided inside through a central opti- 

 cal assembly. 



In December, the U.S. Navy added to its 

 Fleet the 6,500-ft, 3-man sister submersibles 

 SEA CLIFF and TURTLE (originally 4 t/T£C 

 / & //) built by General Dynamics (Fig. 3.25); 

 TURTLE was slated for assignment to the 

 Navy's AUTEC in the Bahamas, and SEA 

 CLIFF was to be assigned to Woods Hole 

 Oceanographic Institution (37), though 

 WHOI later declined the offer. 



Under contract to the Grumman Corpora- 

 tion of Bethpage, New York, Jacques Piccard 

 designed and Giovanola Brothers built the 

 48-ft-long, 2,000-ftP.Y-J5 in Monthey, Switz- 

 erland (Fig. 3.26). Capable of 4- to 6-week 

 duration dives, PX-15 (later christened BEN 

 FRANKLIN) was foreseen by Grumman to fill 

 a needed gap for extended missions which 

 submersibles at that date could not perform 

 (38). For its first mission BEN FRANKLIN 

 would perform a 30-day drift in the Gulf 

 Stream relying on the current for propulsion 



Fig 3 25 Earmarked for work boats in the U S Navy s Bahamian Test Range. AUTEC t and // were redesignated SEA CUFF and TURTLE and ultimately came under Submarine 



Development Group-One in San Diego- (US Navy) 



57 



