In the scene where Dana Andrews' character, Pat Banyon, comes off the supply schooner, and ties his dinghy up on the dock, watch how he ties the line to the bollard. He uses a fast method to tie a clove hitch, belying Andrews' significant experience as a sailing and boating enthusiast.
The invasion of Denmark by Nazi Germany started on April 9th, 1940 and lasted only 6 hours. The invasion was called Operation Weserubung and the occupation lasted until 1945.
Most Navy convoys supplying Britain during World War II were formed in Halifax, Nova Scotia, Canada and crossed the Atlantic under constant threat posed by German U-boats.
This was the only film that Dana Andrews (Pat Banyon) and his younger brother Steve Forrest (Holtz) made together.
Based on the novel "The Gaunt Woman" by Edmund Gilligan which was serialized in The Saturday Evening Post from October 10 to November 21, 1942.