http://www.servicios-nauticos.com.ar/ais/ais.htm 출처 : 00님 해양수산부의 GICOMS과 해군의 AIS 종합전시체계의 연동체계 구성도 AIS Symbols COG/SOG vector changes its length with speed. ROT mark is viewable at the COG/SOG vector tip when a target has FURUNO Satellite Compass SC-50/110 or gyrocompass, which deal ROT serial sentence, installed. http://www..