Measuring water temperature
Currently, I'm using a floating pool thermometer that I got at Walmart for measuring the lake temperature. I rigged a line with fishing weights to sink it below the surface of the water. I attached a fishing float (thanks Bass Pro Shop!) that I wind around one of the bungees on the kayak to keep it with us.
But, there's condensation in the casing...and it makes it hard to read.
What do YOU use to measure water temp?
For those who do their EC qualifying swims.... is there an expectation of some sort of official (e.g. the weather service) water temp usage? Or, is local temperature monitoring sufficient (thermometer over the side of the observation vessel)?