iPhone
Catalyst waterproof case
- IP68 waterproof
- For current iPhone models, check yours
- Lanyard attachment
ShiftSail works with nothing more than your phone. A case keeps it dry, a mount keeps it where the crew can see it, an external GPS makes the start more precise and a wind sensor lets ShiftSail see every shift at once.
Spray, rain and the odd swim. The phone in your pocket is usually water resistant, not waterproof, and salt water is harder on it than fresh.
Where the screen sits decides who can use it. On the mast or at the companionway both the helm and the tactician see it, and it stays out of the way of sheets.
A phone updates its position about once a second. An external receiver sends ten updates a second, which gives a steadier distance to the line at the start and a cleaner track after each tack. ShiftSail uses it automatically through iOS.
Without a sensor ShiftSail estimates the wind from your tacks. A Bluetooth wind sensor on the mast measures it directly, so ShiftSail sees every shift at once and also estimates the current better.
ShiftSail is not affiliated with these brands. Check that a case or mount fits your exact device before you buy. [If links earn a commission, say so here.]