[95] U. S. FISH COMMISSION STEAMER ALBATROSS. 



THE ANGLE AND SCOPE OF DREDGE ROPE. 



97 



Its use will be readily understood by reference to the above cutwbere 

 the vessel is backing and the rope trending ahead. The officer in charge, 

 taking the quadrant in both hands and placing himself in proper posi- 

 tion, glances along its straight-edge, inclining it until it is parallel with 



O 



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the dredge rope. The pointer retains its vertical position by gravity, 

 and consequently indicates the angle from the perpendicular at which 

 the instrument is held or the angle of the dredge rope, which, in this 

 case, is 40 degrees. Enter Table II, Bowditch, with this angle as a 



H. Mis. 67- 



