Fetch--no clue
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a fetch is a bit complicated to explain, but it's basically one side of a beat.
If you're going upwind in a yacht/sailing dinghy then you have to beat, which means going at roughly a 45 degree angle to either side of the wind as a boat with sails cannot go directly into the wind. This point of sail is as close to the wind as you can get and is called being 'close-hauled'. With me so far??
A beat is only a beat if you have to use both sides of the angle - ie zig-zagging (tacking) towards the wind to get from A to B.
If you can get from point A to point B without having to tack - that is staying on the same close-hauled course the entire way then you are fetching that point and are said to be on a fetch.
Once you are no longer close-hauled then you're not fetching any more, but veering towards a tight reach (some other time!)
Clear as mud - right??
