WASP Type S10 Trailer log / Trailing log, speedometer, for
WASP Trailer Log for use in yacht navigation. For anyone who doesn't know what this is, you drag the propeller behind a yacht and it provides the water speed. Ideal for reliable navigation during crossings. Good working order, durable copper fittings. Box available, though it's a bit tatty! Happy to post (£10). Any questions, please ask.