EEP-SEA diving and, in fact, all submarine op- 

 erations have a subtle fascination for the aver- 

 age person. Perhaps the reason for this is found in 

 the mystery surrounding such operations due to the 

 fact that the layman is not privileged to witness the 

 TDorfy. The author of this article gives the reader an 

 insight into the more recent advances made in the art 

 and tells how science is enabling the under-sea worker 

 to operate at depths dreamed of but unrealized in the 

 past. 



WE are learning more every day 

 about this supposedly familiar 

 physique of ours; and the thing that 

 seemed impossible for our bodies to en- 

 dure yesterday is in a fair way to become 

 the commonplace of tomorrow. 



Not long ago a chief gunner's mate in 

 the United States navy descended to a 

 greater depth in the sea than any other 

 man has yet gone and returned alive! 

 The average of commercial divers do not 

 go deeper than 150 feet, and two diving 

 experts of the British Navy a few years 

 ago established a record when they went 

 down 210 feet in a land-locked harbor on 

 the Scottish coast. The champion diver 

 of our navy made a submergence of 274 

 feet! 



This astonishing performance rests 

 upon the results of certain investigations 

 carried out by the Deep-water Diving 

 Committee of the British Admiralty 



some time ago, together with additional 

 experience gained here by experiments 

 made in our own service. Until recently, 

 the naval diver qualified for his work here 

 by showing his capability to operate at a 

 depth of 60 feet, and the men have been 

 seldom called upon to work at a depth of 

 100 feet. And yet the Navy Department 

 announces that it is believed that divers 

 henceforth can do useful work 300 feet 

 below the surface of the sea and without 

 the danger due to the physical stresses 

 imposed at such a submergence. 



With the millions of dollars worth of 

 valuable materials carried to the bottom 

 every year in sinking ships, and many of 

 these resting on the sea bed at depths not 

 exceeding 200 feet, this promise of ca- 

 pacity to work at 300 feet and the actual 

 record performance of a descent to a 

 depth of 274 feet open up alluring pros- 

 pects in the way of salvage undertakings. 



