HC Deb 01 December 1927 vol 211 c728W
Mr. HORE-BELISHA

asked the First Lord of the Admiralty whether experiments have now been carried out with the new type of trial apparatus which will enable a sunken submarine to make its position known; and what has been the result of these experiments?

Lieut.-Colonel HEADLAM

Trials have been recently carried out with a new type of apparatus for locating a sunken submarine; they were, however, not satisfactory.