§ 43. Sir J. Graham Kerrasked the First Lord of the Admiralty whether he is aware that infra-red rays possess a remarkable power of penetrating fog, and that infra-red photographs can be taken and developed so rapidly as to be of great value for the detection of dangers to navigation, such as other ships or neighbouring land; and whether he will take steps to ensure that ships over a certain tonnage and all ships licensed to carry passengers shall be equipped with the apparatus necessary for infra-red photography as an additional safeguard against such dangers?
§ The Parliamentary Secretary to the Admiralty (Sir Victor Warrender)While infra-red rays do penetrate atmospheric haze, extensive field and laboratory trials have shown that they do not penetrate fog and that it is not possible to use infra-red photography for the purpose of assisting navigation.