AIS Sonar

No ship selected.

Position from

Heading from

My MMSI (AIS ID)

Manual heading

045°

Manual speed (kn)

AIS source

Relay address

Leave empty when this page is opened from your Worker. Live AIS comes from aisstream.io through the relay; open the Worker's HTTPS address in Chrome so GPS and compass work.

Ship namesShow names next to contacts, not just S-numbers Ping soundSonar ping on every sweep Rig for redRed night lighting that keeps your night vision Keep screen onStop the phone sleeping while the scope is open

Reading the scope

Hull shape shows vessel type; size comes from its AIS length and beam.
Line from the bow points along its heading and grows with speed. No line means stopped.
Rim triangles mark every contact's bearing, brighter when closer. Hollow means beyond range.
Red contacts pass within 0.5 nm in the next 20 minutes.
Waterfall plots bearing over the last minute. Tap a trace to select that ship.
Double-tap a ship, its rim triangle or its waterfall trace to open its details.
Pinch or use − / + to change range. Your heading is the bar on the rim.