Add an external GPS position source to compatible Standard Horizon fixed-mount VHF radios for DSC and AIS functions.
The SCU-31 is a 66-channel external GPS antenna with an integral 49 ft cable. It decodes SBAS correction signals to provide accuracy better than three metres when reception conditions allow.
Key benefits
- Position data for safety functions: Supplies compatible radios with the GPS data required for DSC position functions and supported AIS features.
- Flexible mounting: Can be installed on its supplied base, on a standard extension pole or flush-mounted.
- Installation hardware included: The official package includes the antenna with cable, RA6054200 antenna base and three stainless-steel M3 × 8 screws.
Compatibility and installation
Use only with Standard Horizon radios whose manual or current compatibility list specifies the SCU-31. Choose a position with a clear view of the sky and at least 3 ft / 0.9 m from radar or another transmitting antenna. Test reception before drilling. The supplied base uses the marine-standard 1 in × 14 TPI thread; seal cable entries and any splice against water and corrosion.
Technical specifications
| Model | SCU-31 |
|---|---|
| Receiver | 66-channel GPS |
| Augmentation | SBAS |
| Stated accuracy | Better than 3 m |
| Cable length | 49 ft / approximately 15 m |
| Mounting | Base, extension pole or flush mount |
| Base thread | 1 in × 14 TPI |
| Flush-mount cable hole | 20 mm or greater |
| Supplied accessories | Antenna and cable, RA6054200 base, 3 × M3 × 8 stainless-steel screws |
| Accuracy | Better than 3 m with SBAS correction |
| Included | GPS antenna, antenna base and three M3 × 8 stainless screws |
| Weight | Approx. 90 g for the antenna unit, excluding the 15 m cable (official manual) |
| Dimensions | 85 mm diameter × 30 mm high flush-mounted, or 60 mm high on the supplied base |