49 C.F.R. § 176.176 Signals.
Title 49 - Transportation
When Class 1 (explosive) materials are being loaded, handled, or unloaded on a vessel, the vessel must exhibit the following signals: (a) By day, flag “B” (Bravo) of the international code of signals; and (b) By night, an all-round fixed red light.
Title 49: Transportation
PART 176—CARRIAGE BY VESSEL
Subpart G—Detailed Requirements for Class 1 (Explosive) Materials
Handling Class 1 (Explosive) Materials in Port
§ 176.176 Signals.
