electronic aids to navigation DEPTH—by HECTA echo-sounder, as supplied to the R.N.LI, and to att yachts of the successful British Admiral's Cup team. This instrument indicates depth by pointer and scale, and illumination for night use is by the virtually everlasting 'Betalite'. It has two range scales: 2-5-32 feet and 2-5-32 fathoms (Model A); 2-5-52 feet and 2-5-52 fathoms (Model B) and 0-7-9-5 and 7-95 metres (Model C). A2$*or4* dia. repeater dial is available for the helmsman. Basic price, with one transducer: £80 10s. This is one of a range of compact hermetically sealed navigational instruments which comprise the HOMER and HERON radio and direction-finder, the HARRIER log/speedometer and the HENGIST and HORSA wind direction and speed indicator.

Where accuracy and reliability count: BROOKES & GATEHOUSE LTD and in the U.S.A.: Bath Road, Lymington, Hampshire. Tel: Lymington 4252/3 BROOKES & GATEHOUSE INC., Woodland Building, Larchmont, N.Y. 10533, Tel: 914-834-0044.