A ship carrying explosives gets a 500-yard exclusion zone in Chesapeake Bay

The Coast Guard has created a temporary safety zone around a ship carrying explosive cargo in the Chesapeake Bay. No one can enter this 500-yard area without specific permission from the Captain of the Port.

This is a routine safety measure for dangerous cargo. It means that for a short time, a specific part of the Chesapeake Bay is off-limits to all other marine traffic. The Coast Guard is simply enforcing existing rules about hazardous materials.