 Indefatigables were slightly larger than their predecessors of the Invincible class . They had an overall length of 590 ft ( 179 @.@ 8 m ) , a beam of 80 ft ( 24 @.@ 4 m ) , and a draught of 29 ft 9 in ( 9 @.@ 1 m ) at deep load . They displaced 18 @,@ 500 long tons ( 18 @,@ 800 t ) at load and 22 @,@ 130 long tons ( 22 @,@ 490 t ) at deep load , over 1 @,@ 500 long tons ( 1 @,@ 524 t ) more than the earlier ships . They had a metacentric height of 4 @.@ 78 feet ( 1 @.@ 5 m ) at deep load . 
