American Merchant Ship, Class C-a, Modified for Use of a Private Operator. Many of this design 

 were employed in war service. Rigged model USNM 313024 shows the basic design of the class. (U.S. 

 Maritime Administration photo ip6.) 



The model shows a merchant steamer, having a 

 straight keel, rather upright flaring bow with small 

 "soft-nose"' and very angular forefoot, \'ertical post, 

 well rounded cruiser stern, sharp and short entrance, 

 body about a third hull length, and a long and easy 

 run. Midsection formed with a slight rise in the 

 straight floor, a low firm bilge on a small radius, and 

 tumble-home in the upper topside only. 



The model has a low, raised deck forward, three 

 cargo hatches, and a midship island on which is a 

 2-deck deckhouse having on it a single stack and a 

 bridge structure. Aft are two cargo hatches and a 

 low raised poop. The sheer is unbroken. Two pairs 

 of derrick masts forward and one pair aft act as vents. 



Vessels of the C-2 Class measure 459 feet 2Y2 inches 

 length overall, 63 feet beam, 40 feet 6 inches moulded 

 depth, 25 feet 9 inches draft loaded, 13,898 tons dis- 

 placement to load line, 9250 deadweight tons, 9222 

 gross tons register, 6000 shaft horsepower, 15 '4 knots 

 speed, and 18,850 nautical miles cruising radius. 

 Scale of model is 's inch to the foot. 

 ?_ Gi\'en by U. S. Maritime Commission. 



STANDARD AMERICAN MERCHANT SHIP, C-3 



CLASS, TYPE C-3P 

 Rigged Model, usnm 303025 



This model represents an improved C-Class design, 

 prepared before the last War by the U. S. Maritime 

 Commission, for a turbine-driven, single-screw steamer 

 for use in freight and limited passenger service and as 

 a wartime cargo and transport ship. As merchant 

 vessels they were intended particularly for the West 

 Indian and Central American services. The standard 



plan provided accommodations for 122 in the crew 

 and 1 1 1 passengers. 



The model shows a single-screw steamer ha\ing a 

 straight keel, straight raking stem with "soft-nose," 

 upright post, and broad cruiser stern. The entrance 

 is sharp, the body short, and the run long and easy. 

 The midsection shows a slight rise in the straight 

 floor, a hard bilge on a small radius, and a very slight 

 tumble-home in the upper topside. 



The deck line shows moderate sheer. On the long 

 island amidships is a short deckhouse, atop which is 

 a smaller 2-deck house, containing the bridge and 

 wheelhouse structure and a large and tapered single 

 stack. Two cargo hatches, one derrick mast, and two 

 derrick posts are forward as well as abaft the island. 



Vessels of the C-3 Class measured 489 feet overall, 

 69 feet 6 inches moulded beam, 45 feet 6 inches 

 moulded depth, 16,730 tons displacement to load 

 line, 9975 deadweight tons, and had 8500-shaft- 

 horsepower geared turbines, gi%ing them a speed of 

 16 '2 knots and a cruising radius of 17,692 nautical 

 miles. Scale of the model is ]i inch to the foot. 



Given by U. S. Maritime Commission. 



STANDARD AMERICAN MERCHANT SHIP, C 3 



CLASS, TYPE C-3-S-A2 

 Rigged Model, usnm 313035 



This model represents a standard class of turbine- 

 dri\en single-screw cargo steamer designed by the 

 U. S. Maritime Commission before the last war for 

 general trade. 



The model shows a steamer having moderate sheer, 

 a straight keel, slightly raking straight stem wuth small 



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