Marine Navigation Technology: AIS, GPS and Vessel Monitoring with IoT
YIS aggregating AIS, GPS, engine sensors and weather data into a unified vessel dashboard
A superyacht at sea is an island of technology 500 miles from the nearest engineer. Every system — propulsion, navigation, climate, electrical, safety — must be monitored continuously, with failures detected before they become crises.
AIS Integration
YIS integrates with the vessel’s Class B AIS transponder via NMEA 0183/2000, displaying own-ship data alongside traffic on a live chart.
// !AIVDM,1,1,,B,15M67N0P00G?Uf6,0*73
const vessel = parseAISType1(sentence);
// { mmsi:"366743120", lat:37.8, lon:-122.4, sog:8.5 }
Vessel Sensor Monitoring
YIS monitors the full machinery plant: main engine RPM, turbo temp, coolant temp, fuel consumption, tank levels (fuel, fresh water, grey/black water), battery bank SOC, generator hours, bilge pump run time.
NMEA 2000 Integration
Modern vessels use NMEA 2000 (N2K) as the primary instrument bus — a CAN-bus based network connecting GPS chartplotters, autopilot, wind instruments, depth sounders, engine displays, and AIS transponders. YIS connects to the N2K network via a certified gateway that translates PGN (Parameter Group Number) messages into structured JSON telemetry, logging all instrument data to the cloud at configurable intervals.
N2K carries hundreds of PGN types. YIS currently decodes 60+ PGNs covering navigation (GPS position, COG, SOG, heading, depth), propulsion (engine RPM, fuel flow, coolant temperature, transmission oil pressure), electrical (battery voltage and current, alternator output, inverter status), and environmental (wind speed and direction, barometric pressure, sea surface temperature).
Alarm Management
YIS implements a layered alarm system: sensor threshold alarms (engine temperature above 90°C), trend alarms (fuel consumption rate increasing 20% above baseline), and predicted state alarms (time to fuel exhaustion below 4 hours based on current consumption). Alarms are prioritised by severity and delivered via multiple channels: display on the bridge chartplotter, push notification to crew smartphones, and cloud alert to the vessel manager ashore.
Alarm acknowledgement is tracked — an unacknowledged high-severity alarm escalates to the next crew member in the call hierarchy after 5 minutes. This ensures critical alarms are never silently missed during a watch handover or when the primary officer is briefly away from the bridge.
Voyage Reporting
At the end of each voyage, YIS automatically generates a detailed voyage report: distance travelled, fuel consumed (including harbour generator usage), engine hours, peak speeds, anchorage positions and durations, and a timeline of any alarms triggered. This report is automatically delivered to the owner, charter manager, and captain via email — replacing manual logbook entries that are prone to omission and error.
For commercial charter vessels, this data also supports insurance claims, maintenance scheduling (engine overhaul intervals are typically measured in running hours), and flag state reporting requirements. Having accurate, tamper-evident digital records is increasingly required by maritime authorities in European waters.
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