Doppler Weather Radar
Ship-borne or shore-based weather radar that uses Doppler shift to estimate precipitation intensity and storm motion.
In practice
Modern weather routing services use coastal Doppler-radar feeds (NOAA, EUMETNET) for storm tracking. The bridge accesses via VSAT-delivered weather product overlays on the ECDIS or a dedicated routing display.
Regulatory detail & full definition
Doppler radar is weather radar that uses the Doppler shift of the returned signal to estimate both the intensity of precipitation and the motion of a storm toward or away from the radar. Modern X-band bridge radars include a weather mode that displays precipitation echoes, though this is less detailed than the land-based S-band Doppler networks used ashore. Ship-routing services such as StormGeo, AWT and DTN combine Doppler and satellite data with numerical model output to advise masters on course adjustments around developing convective cells and squall lines.
Related
Source: WMO Manual on Marine Meteorological Services
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