 Two 21 @-@ inch ( 533 mm ) submerged side @-@ loading torpedo tubes were fitted forward of ' A ' turret and eight above @-@ water side @-@ loading Mark V tubes were intended to be mounted abreast the rear funnel on the upper deck , although only four of the latter were carried by Hood . They were loaded and traversed by hydraulic power ; the submerged tubes were fired by compressed air while the above @-@ water tubes used cordite charges . Thirty @-@ two warheads could be accommodated in the two magazines in the hold forward of ' A ' turret 's shellroom . Hood carried Mark IV and IV * torpedoes , each which had a warhead of 515 pounds ( 234 kg ) of TNT . They had three speed settings which governed their range ; from 8 @,@ 000 yards ( 7 @,@ 315 m ) at 35 knots ( 65 km / h ; 40 mph ) , 10 @,@ 000 yards ( 9 @,@ 144 m ) at 29 knots ( 54 km / h ; 33 mph ) , and 13 @,@ 500 yards ( 12 @,@ 344 m ) at 25 knots ( 46 km / h ; 29 mph ) . 
