Pan the map until the crosshair is on the spot, then confirm
Plan a route
Tap Start to place it on the map
Route
J-105 · Sailing
SStartTap to place on the map
EEndTap to place on the map
Depart
Layers
Wind · HRRRGenerated: --
Current · SSCOFSGenerated: --
Tides · CO-OPS · CHSoff
Observationsoff
AISoff
Isochrones--
Route heatmap--
With Wind or Current on, tap the map to read the values at that point. The reading follows the time slider.
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Predicted · CO-OPSObserved
NOAA CO-OPS predictions · feet above MLLW · tap a high/low row or the chart to move the time slider.
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Settings
Vessel type and propulsion mode
Base speed through water under power
Motor when true wind drops below this; sail above itDead-band around the threshold to avoid flip-floppingHold a mode at least this long before switching back
J-105 · 34.4 ft · 7,000 lb · 7 ft draft
Lower = more accurate, slower
Time lost per tack maneuver
Time lost per jibe maneuver
Angular resolution of heading search
Runs the optimizer against 16 forecast-error
scenarios (wind direction, speed, and east-west gradient) and shows the
spread of optimal routes as a heatmap. A confidence picture for sailing —
slower and more expensive than basic routing.
How far back the forecast slider reaches. A few hours is enough
under way; pick 7 days to replay a past race.
Length of each vessel's predicted-course line
(position after this many minutes at current speed)
Dark colours and a dimmed chart for use after dark.
Follows the device setting until you change it here.