U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 28, 2025
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All TitlesTitle 49Chapter IPart 176Subpart G - Subpart G—Detailed Requirements for Class 1 (Explosive) Materials
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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.
