Highlander ECDIS Radar Overlay & CCRP Coordinate Calibration

Highlander ECDIS Radar Overlay: Perfecting Geometric Alignment

Displaying live radar returns directly over electronic vector charts (ENCs) on the ECDIS console enhances navigational situational awareness, allowing navigators to confirm charted navigation marks and detect chart-datum discrepancies instantly. However, overlay accuracy depends strictly on proper CCRP (Common Consistent Reference Point) antenna calibration.

Why Inaccurate CCRP Creates Dangerous Parallax

Because radar scanners and GNSS antenna sensors are physically separated by tens of meters on a commercial vessel‘s mast structure, failing to input precise physical offsets results in horizontal and bearing parallax errors. Radar land returns appear offset from charted shorelines, creating false grounding warnings or masking genuine navigation hazards.

Configuring CCRP Offsets in Highlander InsHelper

1. Measure the vessel reference origin (typically the bridge conning position on the ship centerline).
2. Measure the exact distances (X = athwartships from centerline, Y = distance forward of stern/aft perpendicular, Z = height above keel) for:
   • Primary X-Band radar scanner
   • Secondary S-Band radar scanner
   • Primary GNSS / DGPS receiver antenna
3. Enter these parameters into the InsHelper CCRP configuration menu. The processor automatically shifts radar video centroids in real time based on vessel heading and pivot point geometry.