Raymarine A25062 SeaTalkNG Backbone Kit — NMEA 2000 Network Starter for Marine Electronics

Raymarine A25062 SeaTalkNG Backbone Kit

The Raymarine A25062 is a complete SeaTalkNG (STng) backbone starter kit that provides everything needed to build a NMEA 2000-compatible onboard network for Raymarine marine electronics. SeaTalkNG is Raymarine’s implementation of the NMEA 2000 standard, allowing chartplotters, multifunction displays, autopilot systems, instruments, transducers, and sensors to share data over a single backbone network.

This kit is designed for new installations or expanding an existing SeaTalkNG network and includes all core backbone components — no additional hardware required to get a basic multi-device network running.

Kit Contents

• 1× 5 m (16.4 ft) SeaTalkNG backbone cable
• 4× SeaTalkNG T-piece spur connectors (device drop points)
• 2× SeaTalkNG terminator plugs (male and female, one for each backbone end)
• 1× SeaTalkNG power cable with inline fuse (backbone power supply)

Key Features

• Complete SeaTalkNG backbone starter — cable, T-pieces, terminators, and power cable included
• NMEA 2000 compatible — SeaTalkNG uses the same electrical standard as NMEA 2000 Micro-C
• Supports connection of up to 4 devices on the included T-pieces, expandable with additional components
• Single backbone carries data between all connected Raymarine and compatible third-party devices
• Eliminates point-to-point wiring between individual devices — all devices share one network backbone
• Compatible with NMEA 2000 Micro-C devices via adapter cable (sold separately)

Specifications

• Part Number: A25062
• Network Protocol: SeaTalkNG / NMEA 2000
• Backbone Cable Length: 5 m (16.4 ft)
• Included T-Pieces: 4
• Included Terminators: 2 (male + female)
• Power Cable: Included with inline fuse
• Connector Type: SeaTalkNG proprietary (NMEA 2000 Micro-C compatible via adapter)
• Weight: 1,361 g (approx. 3.0 lb) including all kit components

Compatible Applications

• Raymarine Axiom, Axiom+, and Axiom 2 Pro multifunction display systems
• Raymarine Element series chartplotters with SeaTalkNG connectivity
• Raymarine Evolution autopilot systems and ACU units
• Raymarine i-Series and p-Series instrument displays
• Raymarine transducers, wind sensors, speed/depth instruments with SeaTalkNG connection
• Third-party NMEA 2000 Micro-C devices connected via a SeaTalkNG to DeviceNet adapter cable
• New helm installations requiring a clean multi-device data network
• Expansion of an existing SeaTalkNG backbone (additional cable and T-pieces may be required)

How SeaTalkNG Works

SeaTalkNG creates a single network backbone running through the vessel. Each device — chartplotter, autopilot, instrument, transducer, sensor — connects via a short spur cable to one of the T-piece connectors on the backbone. All devices share data simultaneously: GPS position, depth, speed, wind, heading, and AIS data all travel on the same network. A terminator plug is required at each open end of the backbone to prevent signal reflection.

SeaTalkNG uses the same physical and electrical standard as NMEA 2000 Micro-C, making it compatible with many non-Raymarine devices via an adapter cable.

Technical FAQ

• Is SeaTalkNG the same as NMEA 2000? SeaTalkNG uses the same electrical and physical standard as NMEA 2000 Micro-C but uses Raymarine’s own connector format. A SeaTalkNG to DeviceNet adapter cable allows connection of NMEA 2000 Micro-C devices to a SeaTalkNG backbone and vice versa.
• How many devices can this kit support? The included kit provides 4 T-piece drop points. Additional T-pieces and backbone cable extensions can be added to support more devices, up to the NMEA 2000 network limit of 50 devices per backbone segment.
• Do I need to terminate both ends of the backbone? Yes. Both open ends of the backbone must have a terminator plug installed. The kit includes both a male and female terminator. Running a backbone without terminators will cause network errors and unreliable device communication.
• Can I connect Garmin or Simrad devices to this backbone? Third-party NMEA 2000 devices (Garmin, Simrad, Navico, Furuno) can connect to a SeaTalkNG backbone using the appropriate NMEA 2000 to SeaTalkNG adapter. Device compatibility depends on the data types each device broadcasts and accepts.
• Does this kit include spur cables to individual devices? No. Individual device spur cables are not included and must be sourced separately — confirm the spur cable length and connector type required for each device being connected to the network.

Related Raymarine Networking Products

• Raymarine A06076 — SeaTalkNG to DeviceNet (Male) Adapter Cable, 1 m — connect NMEA 2000 Micro-C devices to SeaTalkNG backbone
• Raymarine Axiom+ 7” Multitouch Chartplotter
• Raymarine Axiom+ 12” Multitouch Chartplotter
• Raymarine Element 9” Touchscreen Chartplotter

Parts Desk Insights

Best Use Case: The A25062 is the right starting point when building a new Raymarine helm network from scratch. It provides a properly terminated 5 m backbone with four device connection points — enough for a typical small vessel with a chartplotter, autopilot, wind instrument, and speed/depth sensor all sharing data. For larger vessels or longer backbone runs, plan your full device list and cable routing before ordering so you can add backbone extension cables and T-pieces in the same order.

Common Issues: The most frequent installation problem is a missing or incorrectly seated terminator — both backbone ends must be terminated or the network will report errors and devices may drop off intermittently. Buyers also occasionally confuse SeaTalkNG spur cables with backbone cables: spur cables connect individual devices to the T-piece, while backbone cable runs between T-pieces. Spur cables are not included in this kit and must be sourced separately for each device. If connecting non-Raymarine NMEA 2000 devices, confirm you have the correct adapter cable — plugging a Micro-C connector directly into a SeaTalkNG T-piece will not make a proper connection.