11. Lieut.-Colonel Sir FREDERICK HALLasked the First Lord of the Admiralty what means exist for indicating the position of a submarine which, through an accident, may be unable to come to the surface provided any on board are alive?
The FIRST LORD of the ADMIRALTY (Sir Bolton Eyres Monsell)A variety of means exist, such as firing of smoke signals, discharge of oil, discharge of air, firing of torpedoes, and sound signalling and tapping on the hull which will be picked up on the listening apparatus in the searching craft. In addition, as I stated in reply to a question by the hon. 1018 and gallant Member on the 10th February, indicator buoys are being adopted.