Asdic

A sonar system used by Allied navies during World War II to detect submarines. Asdic, short for Allied Submarine Detection Investigation Committee, allowed ships to locate and track enemy submarines underwater.

Aquamarine, British Submarine

The Aquamarine was a class of submarines built for the Royal Navy during World War II. These vessels were known for their endurance and torpedo capabilities, and they played a crucial role in the Battle of the Atlantic.

Afloat Convoy Operations

The organized movement of a group of ships, often escorted by warships, to protect vital supplies, troops, or equipment against enemy attack. This involved maintaining strict formations, utilizing radar and sonar systems for detection, and employing tactical maneuvers to defend against submarines, aircraft, or surface raiders.

Afloat Anti-Submarine Warfare

The measures taken to detect, track, and destroy enemy submarines, including sonar, torpedoes, and depth charges.

Afloat Security

The measures taken to protect naval vessels and personnel from threats while at sea, including anti-piracy measures, anti-submarine warfare, and defensive maneuvering.

Advancing Anti-Submarine Warfare

The continuous development of anti-submarine warfare techniques and technologies during World War II, including sonar, depth charges, and improved tactics, significantly impacting the effectiveness of submarine operations.

Airship

A type of aircraft that uses buoyant gas to achieve lift. Airships were used for a variety of purposes during World War II, including reconnaissance, anti-submarine warfare, and bombing.

Airborne Radar

A radar system mounted on aircraft, used for navigation, mapping, and detecting enemy aircraft or ships. Played a crucial role in air combat and anti-submarine warfare during World War II.

Ayqun Class Frigate

A class of frigates built for the Soviet Navy in the 1960s.

Aqx Class Frigate

A class of frigates built for the Soviet Navy in the 1970s and 1980s.