The Deadly Experiment with crew on board, executed between 17:05 and 17:20 hours. {1,5,6,7,9} (One of two possible dates given)
“To the best of Allen’s recollection, the disappearance of the DE-173 occurred between 17:05 and 17:20 hours on, possibly, the 27th or, more likely, the 28th or 29th of October 1943.”
“The ‘result’ was complete invisibility of a ship, Destroyer type, and all of its crew, While at Sea (October 1943)” – Carl M. Allen