[Note 1] On some vessels, the Squid installations were at the stern – the bombs were fired over the length of the ship and dropped into the sea slightly ahead of it.

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.

The salvos were set to explode 25 feet (7.6 m) above and below the target, the resulting pressure wave crushing the hull of the submarine.

[3] Despite its proven effectiveness, some officers, notably Captain Kenneth Adams, RCN, opposed fitting Squid to escorts because it meant sacrificing guns, which would make ships unsuitable for fleet actions.

[4] In April 1977, the Type 61 frigate Salisbury became the last ship to fire Squid in Royal Navy service.

It can also be seen on HMCS Haida, which is on display in Hamilton, Ontario and at the naval museum in Malacca, Malaysia.