| These were used alongside radar and the improved Asdic equipment to more efficiently detect U-boats. |
| Hedgehog solved one of the most pressing problems, keeping ASDIC contact at short ranges. |
| The explosion of a depth charge also disturbed the water, so ASDIC contact was very difficult to regain if the first attack had failed. |
| Intent on getting a definite asdic signal before asking for air support, Jakey steered nearer to the Island. |
| He serves as the company's representative to the Association of information and Dissemination Centers and as editor of the ASDIC Newsletter. |
| The second Netherlands submarine, K.XI, arrived in Fremantle on March 22, 1945 after spending most of the war as an asdic training submarine for the British and Indian navies. |
