Submarine Cargo Ships and Tankers 359 
Table 6 
Comparison of Tankers of Constant Deadweight* 
ae B d V : 
or ° 
(ft) (ft) (ft) (knots) PAS 
Deadweight = 18,750 tons 
569 87.5 21.93 
538 82.8 16.73 
518 79.7 11.83 
Surface 
Surface 
Surface 
Submarine 
Circulart 
Circular 
Circular 
Elliptical? 
Elliptical 
Elliptical 
Circulart 
Circular 
Circular 
Elliptical? 
Elliptical 
Elliptical 
eee eo 
Deadweight = 56,250 tons 
820 | 126.2 42.1 26.3 
777 | 119.6 39.9 20.1 
747 | 115.0 38.3 14.22 
Surface 
Surface 
Surface 
Submarine 
Circulart 
Circular 
Circular 
Elliptical+ 
Elliptical 
Elliptical 
Circulart 
Circular 
Circular 
Elliptical? 
Elliptical 
Elliptical 
PNOeRK PRK RK PNK PH RK 
145,800 
Deadweight = 93,750 tons 
Surface 125,000 - 962 | 148 49.3 28.5 110,000 
Surface 125,000 921 | 141.7 47.2 21.9 45,300 73,300 
Surface 125,000 : 885 | 136.0 45.3 15.5 15,180 21,080 
Submarine 
Circulart 156,250 t 13,780 
Circular 156,250 - : p 37,800 
20,680 
73,400 
Circular 156,250 ‘ 81,050 169,300 
Elliptical+t | 156,250 | 0. : 20,100 30,200 
Elliptical | 156,250 | 0. 55,150 115,300 
Elliptical | 156,250 | 0. 118,100 247,200 
Circular? 156,250 i : 14,230 21,380 
Circular 156,250 5 ‘ 38,900 75,500 
Circular 156,250 MN a 83,600 175,000 
Elliptical? | 156,250 | 0. : 20,800 31,200 
Elliptical | 156,250 | 0. f 56,800 118,700 
PPE PNY Ph Pe Rte 
Elliptical 156,250 E 122,000 255,200 
* Deadweight /displacement ratio taken as 0.75 for surface tankers and 0.60 for submarine tankers. 
¢ Streamlined body of revolution, circular sections, L/D = 7.0. 
$ Streamlined body, elliptical sections, B/d= 4.0. 
§ EHP based on A.T.T.C. 1947 line plus 0.0004. 
