The Lowrance Point-1 is the ideal position and heading device. The Point-1 provides extremely accurate and rapid boat position and speed updates. In addition - unlike other position-only antennas - the Point-1 provides heading for accurate boat direction at any speed and for radar/chart overlay.Specifications and Features: NMEA 2000 position and heading sensor Supports GPS and GLONASS, Galileo-capable with future software update Supports SBAS including WAAS/EGNOS/MSAS 10Hz updates for smooth and accurate location Integrated electronic compass provides 10Hz heading for chart stabilization and radar overlay, plus accurate course over ground even at low speeds Compact, rugged design for all marine environments and fully waterproof Includes spat/pole mount Not recommended for use with MARPA or Autopilot