Section 176.138 - Deck stowage(b) Class 1 (explosives) may not be stowed within a horizontal distance of 6 m (20 feet) from any source of heat and any possible sources of ignition. With the exception of division 1.4 (explosive) materials, Class 1 (explosives) materials may not be stowed within a horizontal distance of 12 m (39 feet) from the bridge, accommodation areas, and lifesaving appliances.Amdt. 176-30, 55 FR 52696, Dec. 21, 1990, as amended at 69 FR 76184 , Dec. 20, 2004; 78 FR 1095 , Jan. 7, 2013