Every person subject to naval law, who,—
(a)deserts his post; or
(b)sleeps upon his watch; or
1[(c) fails to perform or negligently performs the duty imposed on him; or]
(d)wilfully conceals any words, practice or design tending to the hindrance of the naval service;
shall be punished with imprisonment for a term which may extend to two years or such other punishment as is hereinafter mentioned.