1. International Meeting on Radio Aids to Marine Navigation, (H.M.S.O., London 1946), p. 104–107
2. The Merchant Shipping (Radar) Rules 1976, (H.M.S.O., London 1976),issued by the Dept. of Trade
3. Marine Radar Performance Specification 1968, (H.M.S.O., London 1968),issued by the Dept. of Trade and Industry