HMS Cam (K264)

A frigate is a type of warship. In different eras, the roles and capabilities of ships classified as frigates have varied somewhat.

A convoy is a group of vehicles, typically motor vehicles or ships, traveling together for mutual support and protection. Often, a convoy is organized with armed defensive support and can help maintain cohesion within a unit. It may also be used in a non-military sense, for example when driving through remote areas.

The Black Swan class and Modified Black Swan class were two classes of sloop of the Royal Navy and Royal Indian Navy. Twelve Black Swans were launched between 1939 and 1943, including four for the Royal Indian Navy; twenty-five Modified Black Swans were launched between 1942 and 1945, including two for the Royal Indian Navy; several other ships were cancelled.

The Flower-class corvette was a British class of 294 corvettes used during World War II by the Allied navies particularly as anti-submarine convoy escorts in the Battle of the Atlantic. Royal Navy ships of this class were named after flowers.

A corvette is a small warship. It is traditionally the smallest class of vessel considered to be a proper warship. The warship class above the corvette is that of the frigate, while the class below was historically that of the sloop-of-war.

Lough Foyle, sometimes Loch Foyle, is the estuary of the River Foyle, on the north coast of Ireland. It lies between County Londonderry in Northern Ireland and County Donegal in the Republic of Ireland. Sovereignty over the waters has been in dispute since the Partition of Ireland.

The English Channel, also known as simply the Channel, is an arm of the Atlantic Ocean that separates Southern England from northern France. It links to the southern part of the North Sea by the Strait of Dover at its northeastern end. It is the busiest shipping area in the world.

HMCS Waskesiu was a River-class frigate of the Royal Canadian Navy. The frigate served as a convoy escort in the Battle of the Atlantic during the Second World War. It was the first frigate constructed and commissioned into the Royal Canadian Navy. Following the war, the vessel was sold to India where it was renamed Hooghly. Named for the town of Prince Albert, Saskatchewan, there was already a warship named "Prince Albert". The Royal Canadian Navy then named the ship after the town closest to Prince Albert National Park.

HMCS Grou was a River-class frigate that served with the Royal Canadian Navy during the Second World War. She served primarily as an ocean convoy escort in the Battle of the Atlantic. She was named for Jean Grou, a Roman Catholic martyr from Pointe-aux-Trembles, Quebec. The town's name was considered too long for a warship, so they chose something that was significantly tied to it.

HMCS Cape Breton was a River-class frigate that served the Royal Canadian Navy (RCN) during the Second World War. She served primarily as a convoy escort in the Battle of the Atlantic during the war. She was named for Cape Breton Island in Nova Scotia. She was the first to carry her name, HMCS Cape Breton was the second.

A depth charge is an anti-submarine warfare (ASW) weapon. It is intended to destroy a submarine by being dropped into the water nearby and detonating, subjecting the target to a powerful and destructive hydraulic shock. Most depth charges use high explosive charges and a fuze set to detonate the charge, typically at a specific depth. Depth charges can be dropped by ships, patrol aircraft, and helicopters.

An ammunition ship is an auxiliary ship specially configured to carry ammunition, usually for naval ships and aircraft. An ammunition ship's cargo handling systems, designed with extreme safety in mind, include ammunition hoists with airlocks between decks, and mechanisms for flooding entire compartments with sea water in case of emergencies. Ammunition ships most often deliver their cargo to other ships using underway replenishment, using both connected replenishment and vertical replenishment. To a lesser extent, they transport ammunition from one shore-based weapons station to another.