Chartplotters and cross-bearings
Radar fixes on known references are a backup means of finding your
positions. Alternatively, you might find radar useful in arriving at
some physical point. Full radar display is supported by: SeaClear II, Jeppesen/NobelTec Admiral, MaxSea (Commander*, Explorer*, Professional) and may be supported by any radar with a video output coupled with a chartplotter that accepts video input.
Other real-time navigational information, which some chartplotters accept, include compass bearings (support
on P-Sea WindPlot II Jeppesen/NobelTec Admiral, Tiki Navigator
Pro) and wind gauges (available in SeaClear II, Global Navigation
NavPak [all versions]. Tiki Navigator Pro). Some chartplotters that allow a good deal of manual capability, including manual radar bearings, celestial navigation (Global Navigation NavPak [??]), or dead reckoning.