For the carriage of weapons on ships calling at their ports
The US Coast Guard has posted an updated Port Information Matrix providing information received from various foreign governments in relation to the carriage of weapons on ships calling at their ports.
The Port Information matrix is the summary of Port State Response to Request for Information Regarding Carriage and Transport of Self-Defence Weapons Aboard U.S. Commercial Vessels
To View the Matrix please click here
Source: USCG