船殻 is read as せんこく (senkoku) and means hull.
せんこく
senkoku
せんぱく
vessel
ふなよい
seasickness
せんび
stern of a ship
せんそう
ship's hold
せんいんほけん
seamen's insurance
せんぱくあんぜんほう
Ship Safety Law (1933)
せんたい
fleet
せんぱくぎじゅつけんきゅうじょ
Ship Research Institute
せんぱくせいびこうだん
Maritime Credit Corporation
せんきゅう
ship's classification
せんえい
sign of a ship (e.g. through fog, silhouette, etc.)
ふなにしょうけん
bill of lading