Eastern Sea Frontier

The Eastern Sea Frontier (EASTSEAFRON) was a United States Navy operational command during World War II, that was responsible for the Sea Frontier along coastal waters from Canada to Jacksonville, Florida, extending out for a nominal distance of two hundred miles.

These orders were modified as of 1 March 1941, giving Admiral Andrews additional duties as Commander, North Atlantic Naval Coastal Frontier.

On 3 April 1941, a second plan was issued to modify NA-NCF-44 to make it applicable to the concept of war outlined in "RAINBOW No.

This modification was entitled, North Atlantic Naval Coastal Frontier Plan O-4 (RAINBOW No.

2 (WPL-46) was issued in May 1941, it included important directives on the eventual organization of task forces and command relations in the naval coastal frontiers.

Eastern Sea Frontier's headquarters were located at 90 Church Street in Lower Manhattan.

The commander of the Eastern Sea Frontier, until the closing months of 1943, was then-Rear Admiral Adolphus Andrews.