asdic

'We're just assuming that he hasn't been tracking us on Asdic.

ASDIC was effective only at low speeds.

In reality, ASDIC could detect only one submarine in ten during exercises.

ASDIC was a central feature of the Battle of the Atlantic.

Anti-submarine sensors included sonar (or ASDIC), although training in their use was indifferent.

Picked up on ASDIC by Walker, she was depth-charged and severely damaged.

ASDIC was useless against surfaced submarines, and flares could not be used at the low altitude required by aircraft to make an attack.

However, considerable development of ASDIC took place in the UK, including integration with a plotting table and weapon.

On closing the range, the surface ships found the U-boat with ASDIC (sonar) and attacked.

While operational control was given to the Admiralty, the faith of both services in ASDIC proved ill-founded.

In a refit in 1939, she was fitted with anti-submarine detection equipment (ASDIC).

The main developments in this period were in detection, with both active sonar (ASDIC) and radar becoming effective.

The effectiveness of early ASDIC was hamstrung by the use of the depth charge as an anti-submarine weapon.

This acronym replaced the British acronym ASDIC.

I understand that some of the latest U-boats are quite quick under water and one could easily be trailing us by Asdic without our knowing anything about it.'

At the outbreak of war, A/S weapons were limited to the depth charge and ASDIC (sonar).

The ship was fitted with a Type 119 ASDIC set to detect submarines by reflections from sound waves beamed into the water.

These boats were the first British submarines fitted with Asdic and VLF radio which could be used at periscope depth.

From what I could understand the British Asdic had lost the boat, as if it had suddenly vanished, but they were still certain it remained down there.

She was refitted again to meet Canadian standards, including the installation of ASDIC (sonar), and taken over by them on 1 February 1937.

Specialized training equipment, including gunnery, ASDIC, radar, communication, seamanship and engineering was installed and recruiting commenced.

Unfamiliar sounds were then heard via the ASDIC (Sonar), Hedgehog was tried once more, this time with more success.

An attacking vessel would usually detect a submerged contact using its sonar (referred to at the time by the British as ASDIC).

At around 06:00 on 3 May, U-371 attempted to evade ASDIC (sonar) detection by lying on the sea floor.

As the submarine dived, Blankney achieved firm ASDIC (sonar) contact and made three depth charge attacks.