Seagoing Tug and Salvage Vessel, Class V-4, Fitted for War Service. Rigged model L s.\M 

 shows basic design of class. (U.S. Maritime Adminisliatiuii phola sn-jg.) 



13020 



SEAGOING TUG, V-4 TYPE, 1942 

 Rigged Model, usnm 313020 



The model represents a niodern seagoing, raised- 

 deck tug designed during the late war by the United 

 States Maritime Commission, as a standard design. 

 It had a diesel engine of 2250 horsepower, and a 

 single screw with Kort nozzle. A number of these 

 were laid down in 1942-46 to be used for ocean towing 

 and salvage work. The vessels were diesel-powered 

 and resembled the large European seagoing tugs and 

 salvage vessels. 



The model shows a seagoing steel tug hull having 

 marked sheer, a straight keel with some drag, a 

 straight, upright, and "soft nose" stem, a round fan- 

 tail counter with tumble home in the bulwarks, and a 

 cutaway skeg with shaft exposed for some distance. 

 The entrance is moderately sharp and the run fine. 

 The midsection is formed with a rising straight floor, 

 a low hard bilge, and a slight tumble-home in the 

 topside. 



The sheer line is broken by a raised forecastle deck, 

 running to a little abaft amidships, on which is a 

 rather large deckhouse with a wheelhouse and bridge 

 structure at its fore end. A low, oval dummy stack is 

 fitted, with a pole mast forward and a derrick pole and 

 boom aft. A towing winch is located abaft the break 

 of the raised deck and under an overhang. 



These tugs were 194 feet 9 inches long, 37 feet 6 

 inches beam, drew 16 feet 4}2 inches at the post, and 

 had a tonnage depth of 21 .5 feet. Their displacement 



tonnage was 1613, and their registered tonnage 1117 

 gross. Scale of model is 's inch to the foot. 

 Gi\en by the U. S. Maritime Commission. 



NAVAL STEAM LAUNCH, 1862-63 

 Builder's Half-Model, usnm 76044 



This half-moclcl was made Ijy Dennison J. Lawlor, 

 shipbuilder, late in 1862 for the purpose of Ijuilding, 

 by contract, several steam launches for the U. S. 

 Navy. The launches were built at East Boston, 

 Massachusetts, during the winter of 1862-63 and one 

 of these boats was used by Lt. W. B. Cushing, U. S. N., 

 in the torpedoing and sinking of the Confederate 

 States steam, ironclad ram Albemarle, a notable naval 

 incident in the Civil \Var. The launch, fitted with a 

 spar torpedo movmted on a swivel at the bow, was 

 run up on to the log-raft boom around the ram; 

 the spar-torpedo was then placed under the casemate- 

 overhang of the ironclad and there exploded. When 

 the ram was later raised it was found that the explo- 

 sion had blown a hole in the side of the ram as well 

 as doing other damage. The launch used by Cushing 

 had a vertical [toiler and is said to have had a maxi- 

 mum speed of between 7 and 8 knots. It was de- 

 stroyed by gunfire in the attack. 



The half-model shows a launch hull of the cutter 

 form, having moderate sheer, a straight keel with 

 some drag, well rounded forefoot with straight, 

 upright' stem rabbet above, slightly raking post, 

 and a \"ery short counter ending in a shallow, flat, 



154 



