Port and Starboard Discrimination Device of Another Ship by Marine Radar

Abstract

The port and starboard discrimination device is composed of a marine radar with some adaptor and a simple receiver. The system of the device is undermentioned ; (1) The port and starboard discrimination is limited among the ships with this device. (2) p.r.f. is changed when scanner pass over fore and aft line. (3) The receiver accepts this change of p.r.f. and discriminate port and starboard of another ship. Foundamental field tests at sea were performed between "Taisei Maru" and "test boat", and the effect of the device was confirmed. The tested device has some shortcoming, however, the authors believe that if the defects of this device are improved, it may contribute to collision avoidance.