| Type 144 | |||||
| Type | Hull mounted | Range | N/A | In service | 1942 |
| The Type 144 was an active set designed for use with AS mortars such as Hedgehog. The transducers were carried in a streamlined gyrostabilised dome under the hull. | |||||
| Type 144Q | |||||
| Type | Hull mounted | Range | N/A | In service | 1943 |
| The Type 144Q was a modified Type 144. A 'Q' attachment was fixed to the transducer dome and angled down 15 degrees. This was to maintain contact with deep targets at short range. | |||||
| Type 147P | |||||
| Type | Hull mounted | Range | N/A | In service | 1943 |
| The Type 147P was used for depth finding. | |||||