Apparent wind indicator

An apparent wind indicator, as found on sailboat, is a small weather vane or arrow that gives an indication of the current apparent wind direction. This indication allows the skipper to set their sails or their course for best performance, according to the points of sail.

The device is often referred to as a Windex, which is a trademark owned by Davis Instruments [1].

Examples of modern apparent wind indicators for dinghies and open keelboats

gollark: There is actually "processing in memory" now.
gollark: iwd/iwctl or NetworkManager, in general.
gollark: Well, i don't think any but the top i5s actually have E-cores, so just slightly higher IPC and clocks.
gollark: Get a better board, bee.
gollark: Can't wait for AVX-literally all accessible memory simultaneously.

References

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