THE SUBMARINE BOAT. 



735 



Lake boat. 



Length over all, 65 feet. 

 Breadth of beam, 11 feet. 

 Displacement afloat, 115 tons. 

 Surface, buoyancy, 55 tons. 

 Engine horsepower 250, applied direct 

 to shaft. 



Battery capacity, 75 horsepower for four 

 hours. 



Twin screw. 



Hull sufficient strength to submerge 

 150 feet. 



Armament, 3 Whitehead torpedo fir- 

 ing tubes. 



Means of submerging, 3. Admitting 

 water ballast, submerging with the use of 

 hydroplanes, and hauling down to the 

 bottom or to any desired depth by anchor 

 weights. 



Means of coming to the surface. 4. 

 Discharging water ballast by either com- 

 pressed air, power or hand pumps; by 

 the hydroplanes, when under way; by 

 lowering the anchor weights and by re- 

 leasing the drop keel. 



Fuel-carrying capacity, 1,400 gallons. 



Speed (estimated), 10 to 11 knots. 



Submerged speed (estimated), 7 knots. 



Means of traveling on the bottom. 



Submerges on a level keel. 



Means to enable divers to leave and 

 enter the vessel while submerged. 



Automatic and positive maintenance of 

 trim. 



Means to measure distance traveled 

 when submerged. 



Invisibility in a semisubmerged con- 

 dition. 



Capability of steering long and correct 

 courses. 



Automatically controlling depth of 

 submerging. 



Means forcutting cables and for mining 

 and countermining purposes. 



A water-tight superstructure affording 

 deck space and sufficient buoyancy to 

 make her seaworthy and also afford 

 space for storage of fuel, air tanks, etc. 



Automatic drop keel and other auto- 

 matic features to prevent submerging 

 below a safe depth. 



Holland hunts. 



Length over all, c;; feel 4 indies. 



Breadth of beam, 1 1 feet 6 inches. 



Displacement afloat, L05 tons. 



Surface buoyancy, l"> tons. 



Engine horsepower L60, less a consid- 

 erable loss due to driving indirectly 

 through gearing. 



Battery capacity, 70 horsepower for four 



hours. 



Single screw. 



Strength of hull approximately the 

 same. 



Armament, 1 Whitehead firing tube. 



Means of submerging 

 water ballast and driving 

 rudders. 



2. Admitting 

 with horizontal 



Means of coming to the surface, -. 

 Discharging water ballasl ami use of 

 horizontal rudders when under way. 



Fuel-carrying capacity, 850 gallons. 

 Speed (estimated i, s knots. 

 Submerged speed (estimated I, 7 knots. 



Dives by the bow at varying angles. 



