"Margo and the Yachting Party," by Terence Faherty, in Alfred Hitchcock's Mystery Magazine, March/April 2023.
This is the ninth appearance in this space by Terence Faherty and the second for these characters.
It's 1941. Margo Banning is an assistant on a radio show in New York City. One of the stars of the show is criminologist Philip St. Pierre. He is an odd duck with elaborate tastes in clothing and a new hobby of sorts: he is hunting for Nazi spies.
On the show he announces that "Certain German sympathizers here in our fair city have hatched a scheme to resupply the German U-boats operating off our coast." He urges everyone to be on the lookout for a "pirate yacht."
After the show an FBI agent arrives with the bad news that a Nazi courier St. Pierre had caught earlier had escaped. The detective refuses to help the Feds, being determined to hunt for his mystery ship.
It seems like St. Pierre knows more than he is telling (as usual). And Margo gets caught up in the mess (also as usual).
A light and fun historical.