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AIS
If you have an AIS receiver or transponder on board, the app shows every vessel and AIS aid to navigation it receives live on the chart, with a fitting symbol for each vessel type, pointing in the direction of travel and sized by vessel length. Tap a vessel to see its name, type, distance, course, speed, destination and dimensions, plus the closest point of approach (CPA) and the time to it (TCPA). The Hub merges AIS from NMEA 2000 and NMEA 0183 and passes every target on over Wi-Fi to navigation apps. AIS works on board, without internet and without a subscription.
What you get
On board
- Vessels live on the chart: in the Plotter and on the other charts in the app, as long as your app is connected to the Hub.
- Your Boat Buddies’ boats are also recognised by the app through AIS by their MMSI and shown with a boat photo or their own Boat Buddy symbol and name, not as an ordinary target.
- 15 vessel symbols, for example sailing boat, pleasure craft, fishing vessel, tug, passenger ship, cargo ship, tanker, SAR and military. The size follows the vessel length.
- Vessel detail card (only what the vessel transmits appears):
| Area | What you see |
|---|---|
| Header | Name and vessel type; the MMSI if there is no name. If the vessel is also one of your Boat Buddies’ boats, with boat photo and status line |
| Main part | Received (how long ago), distance, CPA, TCPA, speed over ground, course over ground, heading |
| Further details | Latitude and longitude, rate of turn, navigation status (for example “At anchor”, “Underway sailing”, “Not under command”), destination, dimensions, draught, IMO, call sign, MMSI |
- Aid to navigation detail card: name, received, distance, type (for example cardinal and lateral buoys, beacons, lights with sectors, RACON), physical or virtual, status, dimensions. If a buoy is not at its intended position, the detail card warns “Off position” and the symbol turns yellow.
- In the Plotter, tapping a vessel makes the instrument bar jump to its detail card, and tapping again closes it.
- Passing on to navigation apps: The Hub passes every AIS target on over Wi-Fi to navigation apps such as Garmin Boating (formerly Navionics), OpenCPN or Aqua Map, whether it receives them over NMEA 2000 or NMEA 0183. This way you see AIS from an NMEA 2000 transponder in your navigation app, without an additional gateway. See NMEA 0183 over Wi-Fi.
Remotely
- AIS is only available on board. The Hub does not store AIS and does not send it to the cloud.
How it works
- Connect your app to the Hub.
- Open Menu › “Plotter” or another chart of the app. The vessels appear by themselves.
- Tap a vessel or aid to navigation to open its detail card.
- Via the layers button of the chart, in the “Map overlays” dialog, you switch “Other vessels” and “AIS Aids to navigation” on or off. Both are on by default.
Requirements
- An AIS receiver or transponder on the NMEA 2000 network or on an NMEA 0183 Wi-Fi multiplexer that the Hub uses.
- App connected to the Hub.
- For CPA and TCPA: your current position, speed and course over ground, and the other vessel sends speed and course.
- No internet, no account, no subscription needed.
Permissions and subscription
- Subscription: fully usable without a subscription; the standard subscription adds nothing extra.
- On board: Everyone connected to the Hub sees all targets.
Safety notice
- No collision alarm, no guard zone. CPA and TCPA are a display only, with no sound, notice or push.
- Distress transmitters without an alarm. AIS-SART or MOB transmitters appear as an ordinary target, at most with the status “SART active”.
- CPA follows the other vessel’s report. CPA is recalculated when the other vessel reports a new position. Your own course change only shows with its next report.
Notifications
None.
Messages and special cases
| Situation | What happens |
|---|---|
| No own position, speed or course | CPA and TCPA are missing in the detail card |
| Vessel sends no speed or no course | CPA and TCPA are missing |
| Vessel has not sent a position yet | appears only with its first position |
| Calendar period selected that includes today | The vessels stay on the chart, as with a period up to now |
| Past period selected | The chart hides all targets |
| Vessel does not report for 2 minutes | symbol fades |
| Vessel does not report for 10 minutes | vessel disappears from the app, an open detail card closes |
| Briefly no connection to the Hub | When you reconnect, all targets of the last 10 minutes appear at once |
| Hub restart | The targets rebuild as reception resumes; names and types arrive with the next static data, for pleasure craft after a few minutes |
Offline behaviour
- AIS needs no internet and works entirely on board.
Frequently asked questions
Do I need internet or a subscription for AIS?
No. AIS works entirely on board, without internet, without an account and without a subscription. You only need an AIS receiver or transponder on the NMEA 2000 network or on an NMEA 0183 Wi-Fi multiplexer that the Hub uses.
Does the app warn me about a collision?
No. CPA and TCPA are a display only, with no sound, notice or push. There is no collision alarm and no guard zone.
Can I also see the AIS targets in Garmin Boating, OpenCPN or Aqua Map?
Yes. The Hub passes every AIS target on over Wi-Fi to navigation apps such as Garmin Boating (formerly Navionics), OpenCPN or Aqua Map, whether it receives them over NMEA 2000 or NMEA 0183. This way you see AIS from an NMEA 2000 transponder in your navigation app, without an additional gateway.
Why are CPA and TCPA missing for a vessel?
For CPA and TCPA the app needs your current position, speed and course over ground, and the other vessel has to send speed and course. If one of these values is missing, CPA and TCPA stay empty.
Why does a vessel disappear from the chart?
If a vessel does not report for 2 minutes, its symbol fades. After 10 minutes without a report it disappears from the app.
Can I see AIS remotely?
No, AIS is only available on board. The Hub does not store AIS and does not send it to the cloud.