394 HAYES— U. S. NAVY MV TYPE OF HYDROPHONE. 



given in Fig. lo, it will be seen that in the coastal waters south of 

 New England the i(X) fathom curve runs in a nearly east and west 

 direction. It should also be noted that the shoaling inside of this 



Fig. 10. 



curve is comparatively slow, while outside of it the depth increases 

 rapidly. This ocean plateau, which is crossed by all vessels entering 

 or leaving New York for European or Mediterranean ports, is read- 



