33 CFR 401.32 - Cargo booms
(a) Every vessel shall have cargo booms secured in a manner that affords maximum visibility from the wheelhouse.
(b) Cargo or containers carried, forward or aft, on deck shall be stowed in a manner that:
(1) Affords an unrestricted view from the wheelhouse for the purpose of navigation; and
(2) Does not interfere with mooring equipment.