Schematic of Brushfire's Signet Scientific MK9 knotmeter

My knotmeter wasn't working, apparently because the needle and front pivot had become detached from the meter coil. I've repaired that, but don't know yet whether the paddlewheel is still functional. Someday I'll fill in the component values in this diagram... .

Here's another good candidate for why the knotmeter was nonfunctional...

It's pretty tough to see in the picture, but the arrow is pointing at the paddlewheel for the knotmeter transducer. The one spot I didn't catch with the hull brush and it was jammed up with goo... . After the bottom job, we'll see how well it works.

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