Castrol Ltd 159 Chloride Group Companies . . . . . . . . . . . . . . . . . . . . 159 Coastal Radio Ltd 159 Cogswell & Harrison Ltd 159 Duckhams Oils Ltd. . . . . . . . . . . . . . . . . . . Inside front cover Gardner Engines (Sales) Ltd. . . . . . . .. . . . . . . . . . . 163 Groves & Guttridge Ltd 171 International Yacht Paints . . . . . . . . . . . . . . . . . . . . 171 Manchester Liners Ltd. . . . . . . . . . . . . . . . . Inside back cover Martell Ltd. . . . . . . . . . . . . . . . . . . . . . . Back cover Neco Marine Ltd. .. .. .. .. .. .. .. .. .. .. .. 171 William Osborne Ltd. 171 Parsons Engineering Co. Ltd. . . . . . . . . . . . . . . . . . . 187 Players Ltd 167 Pyrene Co. Ltd 165 RFD-GQLtd. 165 Rentokil Group Ltd 188 Westland Helicopters Ltd 185 Richard B. Wigfull & Son Ltd 165 C. P. Witter Ltd J61 Classifieds . . . . . . . . . . . . . . . . . . . . . . . . 161.