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A depth charge is an anti-submarine ... Some Royal Navy trawlers used for anti-submarine work during 1917 and 1918 had a thrower on the forecastle for a single ...
Sink rate was 43.5 ft/s (13.3 m/s) and a clockwork time fuze was used to determine the detonation depth. All three projectiles had to be set to the same depth; this could be continuously updated right up to the moment of launch to take into account the movements of the target. [2] The maximum depth was 900 feet (270 m).
The Mark VII depth charge was the primary British anti-submarine weapon until 1944 when the anti-submarine projectile launchers the Hedgehog spigot mortar and Squid three-barrelled mortar introduced in 1943 and 1944 proved more effective. [1]
Early depth charges were designed to be rolled into the water off of the stern of a fast ship. The ship had to be moving fast enough to avoid the concussion of the depth charge blast. Later designs allowed the depth charge to be hurled some distance from the ship, allowing slower ships to operate them and for larger areas to be covered.
Until depth-finding sonar became available (the first was the Royal Navy's Q attachment in 1943), there was a "dead period" during the final moments before a depth-charge attack began when contact with the target would be lost. U-boat commanders became adept at sharp course changes and direction speed at these moments to break contact and escape.
After World War I depth charge throwers were developed, which could hurl depth charges some 100 feet (30 m) from the side of a ship, perpendicular to its direction of travel. These were a significant improvement over the old method, permitting the use of large 'patterns' of up to ten depth charges from the throwers and stern depth charge rails ...
A small number of those named on the list may still have contact with children through paid work or volunteering, the BBC has discovered. ... that adults and children had a human right to have sex ...
First World War sailor with a fish stunned by the explosion of a depth charge Shells exploding in the water during naval battles also tend to kill fish with the same effect of blast fishing, [ 10 ] only without any systematic attempt to collect the harvest.