This section brings together the approximately 700 objects and photographs used in Canada's Naval History. Use this section to directly access objects and photographs grouped by type, as shown below, or use the search function above to search through them by title.

Hedgehog Anti-submarine Projectile

Starting in mid-1943, Canadian escort vessels began to be equipped with the Hedgehog anti-submarine mortar, which fired groups of projectiles like this.

The Hedgehog shot 24 depth-bombs over 200 metres in front of a warship. The projectiles, which sank in a broad elliptical pattern, would explode on contact with a submarine's hull. The Hedgehog offered a major advantage over conventional depth charges because it allowed an attacking ship to track the targeted submarine with ASDIC (sonar) up to the moment of firing.

Projectile, Anti-submarine, Hedgehog
CWM 19680174-001