Marine Hydrographic Surveys 



65 



plored for purposes of navigation is yet 

 smaller and is almost confined to the 

 frozen regions of the earth, which are 

 unvisited by commerce and unpeopled. 

 A prominent feature of the investigation 

 and one which can not fail to bring a 

 realization of the great responsibility 

 resting upon navigators and the skill and 

 caution required of them in the naviga- 



tion of coastal waters in nearly all parts 

 of the world is the immense extent of 

 the coast line which, while sufficiently 

 known to be approached, can not be 

 navigated with security. 



It is in general useless for the nautical 

 surveyor of the present day to devote 

 himself to the rapid reconnaissance of a 

 coast in the manner that proved so ac- 



