238 



SUBMARINE CABLE LAYING AND REPAIRING. 



Tank, ISft, diameter. Cone, 4ft. mean diameter. 

 Net coiling space per foot height of tank = 242 cubic ft. 

 Type S E 0*87 nauts per foot height coiled. 



A 



E: 



E 



H.I. 



Bi 



L.L 



B 



Di 

 D 



1-61 



2-03 



2-3 



30 



3-56 



4-85 



5-25 



6-0 



7-5 



These tables are usually worked out for each tank on board 

 the various ships or at the depots on shore. It should be 



Fig. 137.— Position of Cable Tank. 



borne In mind that the figures depend upon the overall dia- 

 meter of cables being known. In new cables the yarn serving 

 outside the sheathing is intact, but in old cables it is worn or 

 altogether stripped, thus altering the diameter. Also cables 

 known by the same type letter vary in size owing to the sheath- 

 ing or core being of different dimensions. For instance. Type 

 D is made up in some cables with twelve sheathing wires of 

 No. 13 B.W.G., and in others with 14/13 or 15/13. Also 

 it should be remembered that the calculations take no account 

 of irregularity in coiling, such as coiling short of the cone 

 on the inner turns, coiling where there is no cone or failing 

 to lay the turns neatly together ; and nothing is allowed for 



