This standard is a synchro-type wind direction anemometer (hereinafter referred to as wind direction) used to measure wind direction and speed by installing it on a ship.
KS V 9509-2009 history
2014KS V 9509-2014 Wind direction & indicating equipment for marine use-Synchro type
2009KS V 9509-2009 Wind direction & indicating equipment for marine use-Synchro type