Originally Posted by casey1999
When I first started sailing in 1980 I crewed on a boat from Annapolis to Antigua. We had only a sextant, a log and charts. In a storm for 3 days we could not take noon sites due to clouds, used DR. The log we used was a metal fully mechanical one hung from the stern rail and had about 100 feet of line to a propeller. A few weeks ago I was looking to buy one of these but no one seems to make them. Everthing I see is electrical and solid state. Any idea where you can buy a mechanical log like this?
I had one in my first boat. It was the most modern hardware it had. well, it only had that and a compass
I bought it in England but I guess that nobody is making them anymore because that was an expensive piece of equipment. Yes it was a precision mechanic device and as all mechanic complex things it would be much more expensive to build than an electronic one. Mine was a lot simpler but it was basically this:
It was called a knotmeter. This guys still make an inexpensive and much simpler version that works not with rotation but with water pressure :