HC Deb 26 October 1939 vol 352 c1579W
Mr. McEntee

asked the First Lord of the Admiralty whether his attention has been called to a life-saving appliance known as lifebelt light, patent No. 491078; and whether he has considered its use on ships during the war?

Mr. Shakespeare

Yes, Sir. The question of providing means to enable survivors to indicate their position in darkness is under consideration at the Admiralty, and Mr. Double's device is receiving consideration together with others which are known to be capable of performing the same function.