Instrument: Weather Transmitter
The ship-mounted Vaisala Weather Transmitter WXT520 measures: Wind speed and direction; Liquid precipitation: rainfall, duration, intensity; Barometric pressure; Air temperature and Relative humidity. (for more information see http://www.vaisala.com/en/products/multiweathersensors/Pages/WXT520.aspx)
Vaisala WXT520 MET sensors mounted on both port and starborad side of the forward mast 15.5 meters above the water line.