Yes, I am aware of the shortcomings of a GPS knotmeter, but I think the advantages far outweigh them for the kind of sailing I do.
-SailFree is free, and only 4.99 for the paid version that gives the high-contrast display you see in the photo. Worth every penny.
-The mounting bracket is 19 bucks at Amazon. https://www.amazon.com/gp/product/B08MC ... UTF8&psc=1
-Will work with most smartphones or tablets.
-Requires no thru-hull or other modification.
One caveat; after using it all summer I found it created a little burn-in ghost on my Android phone. Not really noticeable unless the screen is white, then just barely.
Check photos for mounting. Can't wait to start using it once I get the boat back in the water!


