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Take notes while sailing?

I am wondering if someone knows a nice way to take notes while doing sailing practice or checking wind condition before the race. For example, I would like to write down what is the starboard/port compass angle to check how much the wind may be swinging before the race, or I would like to take a record back about how the practice condition was (I have a rather short memory :)). I tried putting duct tape on the deck and using sharpie, but once the surface get wet, I found it does not work well. Your suggestion is appreciated!

Thanks, Toshi