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PredictWind weather routing software processes GRIB (gridded binary) data from multiple global models—including ECMWF, GFS, UKMO, ICON, AIFS, and proprietary PWG/PWE/PWAI models—to generate offshore passage routes.3:33 Users initiate routing by setting origin and destination points and selecting a departure time, which the software then calculates against boat polars.4:58 Rather than relying solely on the graphical route map, effective passage planning requires analyzing timing through wind and wave graphs, specifically monitoring primary, secondary, and tertiary swells.6:03 The summary table allows for side-by-side model comparison, with a focus on comfort metrics like vertical acceleration to manage crew fatigue and prevent gear failure.6:41 Captains must manually verify routes against navigational hazards by zooming in on charts and setting exclusion zones to avoid shoals, reefs, and traffic.7:35 PredictWind integrates GMDSS safety warnings directly onto the map, which must be checked to ensure routes avoid gale, storm, or cyclone areas.8:35 Continuous re-routing while offshore allows for real-time adjustments based on evolving weather patterns.9:58

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