Carrying sheath knives

A seaman in the merchant marine may not wear a sheath knife on board a vessel without the consent of the master. The master of a vessel of the United States shall inform each seaman of this prohibition before engagement. A master failing to advise a seaman is liable to the United States Government for a civil penalty of $50. (Source: (Pub. L. 98–89, Aug. 26, 1983, 97 Stat. 584.))