Seashark (Fictitious Submarine) A photographer's mate sent along on a war patrol to photograph submariners in action learns what it means to "belong" to the tiny, steel-encased world of the men who fight under the sea. Ernest Cooms is plainly frightened by his assignment aboard the Seashark. The sub's crew adds to this discomfiture by making him aware that simply being aboard a submarine does not make one a submariner. When the sub undergoes a five-hour attack, Cooms bears up well and continues with his duties. After that, he enjoys the privilege of "belonging".