34 



SUBMARINE CABLE LAYING AND REPAIRING. 



gives warning on deck when bottom, at this depth is touched. 

 The apparatus can be set to any depth up to about 35 to 45 



Fig. 24. — James' Submarine Sentry. 



fathoms, and is very suitable for use when laying cable in com- 

 paratively shallow water, such as those following coast lines. 



Fig. 25. — Sentry trailing. 



The "Sentry" consists of two pieces of wood joined at an angle 

 forming a " kite " together with pin, spring and striker, as 



