Distrust AIS course and speed data, verify independently, and assess collisions using the full bridge picture.
AIS course and speed information conveys dynamic movement. It uses two specific metrics: course over ground (COG) and speed over ground (SOG). COG is supplied when the connected position sensor calculates it, while SOG is supplied by the same connected position sensor.
Read BriefingAIS course and speed data help assess target movement while remaining supplementary to radar and visual observations. Dynamic information includes course over ground (COG) and speed over ground (SOG), supplied by connected position sensors when they calculate these values.
Read BriefingAIS course and speed matter for target assessment, relative movement monitoring, and early recognition of close-quarters situations. The system transmits course over ground (COG) and speed over ground (SOG), which are supplied by connected position sensors when they calculate these values.
Read BriefingAIS course and speed verification requires manual checks, as built-in tests do not confirm sensor accuracy before broadcast. The officer of the watch must periodically check own-ship position, speed over ground and sensor information to ensure reliability.
Read BriefingAIS course and speed data may be unavailable or incorrect due to sensor errors, differs from water-relative values, and remains supplementary. Course over ground (COG) and speed over ground (SOG) are dynamic elements transmitted by the Automatic Identification System.
Read BriefingDistrust AIS course and speed data, verify independently, and assess collisions using the full bridge picture.
Read BriefingWhen you are ready to move from evidence to story, continue with the books or follow the complete series order.