The Coast Guard is establishing a temporary safety zone for navigable waters of the Chesapeake Bay within 500 yards of the M/V W- SAPPHIRE. The safety zone is needed to protect personnel, vessels, and the marine environment from potential hazards created by the presence of explosive cargo on board the vessel. Entry of vessels or persons into this zone is prohibited unless specifically authorized by the Captain of the Port, Sector Maryland-National Capital Region (NCR) (COTP), or a designated representative.
Source: Federal Register USCG
Link: Safety Zone; Chesapeake Bay, Baltimore, MD