Yamaha Command Link is a digital network system developed by Yamaha for its outboard engines and marine control systems. It is used to display and manage engine data, navigation information and sensor data on board. It connects various devices together through a standard data network (based on the NMEA 2000 protocol) to achieve a variety of intelligent functions.
Summary in one sentence:
Yamaha Command Link is a digital control and monitoring system for Yamaha marine engines, based on the NMEA 2000 network.

Main functions:
1. Engine data monitoring:
Displays information such as speed, oil pressure, water temperature, fuel flow, total fuel consumption, voltage, etc.
2. Multi-engine synchronous control:
For dual-engine, triple-engine or even quad-engine systems, engine synchronization and unified display can be achieved.
3. Alarm system:
Provides fault alarms such as overheating, low oil pressure, abnormal voltage, etc. to improve navigation safety.
4. Fuel management:
Displays the remaining fuel amount, cruising range, etc., which facilitates voyage planning.
5. Network expandability:
Can connect to other NMEA 2000 devices such as GPS, speed sensor, depth gauge, fuel tank sensor, etc.

System version:
- Command Link (basic version): Displays basic data through a circular instrument (gauge).
- Command Link Plus (enhanced version): Uses a larger color display (such as 6Y8 or 6YC display) to configure more functions and interfaces.
Common accessories and connectors:
- Command Link main cable (backbone cable)
- NMEA 2000 T connector, terminator
- Yamaha 6Y8, 6YC display
- Command Link Gateway (Gateway): Can connect to other brands of systems or MFD (multi-function display) such as Garmin, Raymarine.

