ShipsHappen — remaining-route shading

Development prototype · manual input
Drag the ship or your own marker on the map, or type coordinates below. Everything recalculates live.

Ship

040°
Pick any destination from any starting position — the same logic now handles inbound, outbound, and shifts between two harbor destinations.

Your position

Alert sound

Voices are provided by this computer/browser — they'll differ on other machines.

Status

—

Legend

Remaining route to destination
Charted reach boundary (ENC data)
Ship (drag to move)
Your position (drag to move)
Destination
1.25 nm alert radius (ALERT_RADIUS_NM)
Alert geofence (charted corridor + 200m shore margin)
+ your position must still be ahead of the ship along its route
Prototype for development purposes only — not for navigation. Ship position, heading, and destination shown here are manually entered test data, not live AIS. Not a substitute for VHF, radar, or a proper lookout, and does not fulfill the Rule 5 (Inland Navigation Rules) lookout requirement. Not a complete catalogue of vessel traffic. Location-dependent and cellular-signal-dependent; will have outage areas. Warns — does not protect.