We have a PSYCHROMETER and plan on using it when cruising. We plan on keeping a weather log. That is because we will have the time to do that. It
should be fun and a good safety tactic.
A SLING PSYCHROMETER measures relative humidity, using the cooling effect of evaporation. Two thermometers are used in a sling psychrometer. Wet the cloth of one of the thermometers and swing the psychrometer around a few times. Water evaporates from the cloth, causing the temperatures on that thermometer to be lower than the other.
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