Ships of all sizes were in high demand during WWII and any industry capable of joining steel was employed to build them.  Two companies in Trenton were put to the task.  Aero-Marine Crafts built sleek Hospital ships on the Trent River, while Central Bridge constructed Tugboats, Hospital Ships, Lighters and Fireboats, two miles inshore.  Together over 170 ships were built for the war effort in Trenton, constituting the third largest shipbuilding contract in Ontario. All of this activity was under the direct supervision of Herb Ditchburn, the renowned boat builder from Gravenhurst, famous for his Muskoka speed boats.  As for the submarine connection, come to the presentation and find out.

For this presentation, Roger has collected many photos of the building process developed for the rapid construction of these sturdy craft.