The Mulberry Harbours were reinforced with large floating cement caissons code-named Phoenix’s. Prefabricated in the UK, each had to be towed to Normandy and then sunk in place.

Roger Litwiller Collection, Allen E. Singleton, RCNVR photo, courtesy Bruce Keir, RCNVR. (RTL-BK171)

This photo and collection have been gathered from the crew of HMCS TRENTONIAN and have been used by Roger Litwiller to create the book, White Ensign Flying, The Story of HMCS TRENTONIAN, published by Dundurn Publishing in 2014.