Abstract: A system for collecting and analyzing sail usage data. The system has a sensor on a sail for sensing heel, vibration or tension on the sail, an RFID tag connected to the sensor, an RFID tag reader for reading data of the first parameter from the RFID tag, a memory for storing data read from the RFID tag and a processor for processing the data from the RFID tag. Data received from the sensor is processed to determine a number of hoists of the sail and an amount of time during which the sail was in a hoisted position. The data from the sensor is used to determine which tack the sailboat was on and how long it was on that tack.