Commander R. G Haines and Admiral Sir John Frewel looking at echo sounder.

Commander R. G Haines and Admiral Sir John Frewel
Commander R. G Haines and Admiral Sir John Frewel
Commander R. G Haines and Admiral Sir John Frewel
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Commander R. G Haines and Admiral Sir John Frewel looking at echo sounder.
Commander R.G Haines of Kelvin Hughes. and Admiral Sir John Frewel looking at an example of the world's first echo sounder, a Kelvin Hughes MS3, dating back to 1928.

Kelvin Hughes pioneered the echo sounder in co-operation wth the British Admiralty in 1926. This particular MS3 had just been taken off a Norwegian trawler after 38 years service.
The Scottish Fisheries Museum Trust Ltd
Bk 59 p182
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