These All Round White / Anchor Lamps are saltwater proof, non-magnetic and internationally approved.
Available as a single unit for installation directly to horizontal surfaces, or on a pole with a Plug-in base.
SiRF star III high sensitivity chipset; 20 parallel satellite-tracking channels; 0.1 sec reacquisition time. It also is waterproof & low power consumption GPS Receiver. GR-213 support NMEA 0183 v2.2 data protocol, WAAS/EGNOS and compatible with most GPS software.