The fairway on #5 is in a deep valley. I was down there trying to figure out what the wind was doing. I remember the wind was from the SW on #2, but I couldn't figure out which way that was from deep in the valley.
So am I allowed to use a compass?
Rule #4.3a-1 specifically indicates that the use of a compass is allowed. But I would but an asterisk on that in 2026.
Like most of you, the only compass I have is on my phone. Using the compass app on your phone is probably okay, but using the compass in your mapping application is probably illegal. The same rule noted above also explicitly indicates that you can't use an electronic device that would indicate line of play.
Similarly, if your GPS app gives distance only, then it's allowed. If it does any sorts of calculations on that distance, such as slope, temperature, or pressure, then it's not allowed. It also cannot be used to make club recommendations.
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