E-Series Classic MFD - Overlaying chart with radar using COG reference

[Chuck - Raymarine - Moderator]

E-Series Classic MFD - Overlaying chart with radar using COG reference

There are limitations to COG's ability to function as a substitute for heading data (i.e. when the vessel is stationary or maneuvering at slow speed, or under the influence of leeway (current or wind), then COG may not be representative of the vessel's heading). In order for a vessel to have COG, it must be underway and making way (i.e. don't try to activate radar overlay when the vessel is stationary (i.e. tied to the dock, at anchor/mooring, or when maneuvering) unless interfaced to a source of heading data. One may determine whether the system has been interfaced to a source of heading data by configuring the MFD to display the Heading data item within its Databar or Data application page. Should the Heading data item be dashed (---), then no source of heading data has been interfaced to the system.

When operating with the final E-Series Classic MFD software update (v5.69), the E-Seires Classic MFDs will support the Chart application's radar overlay feature using COG should the system not be interfaced to a source of heading data. Should one desire to use the MFD's MARPA radar features, then a stabilized heading source supporting 10Hz or greater heading updates is recommended (ex. Raymarine EV-1 Sensor Core, Airmar H2183, KVH AutoComp 1000, etc.). Raymarine's EV-1 Sensor Core has the advantage of being similarly priced to the other sensor alternatives and is a core component of an Evolution autopilot. As such, should the system ever be expanded to include an autopilot, then the EV-1 Sensor Core could be removed from the list of required autopilot components.

Raymarine recommends that accurate 10Hz or greater heading data be supplied to any system using using any of (but not limited to) the following Radar and Chart application features:
- MARPA
- Waypoints Displayed within the Radar Application
- North Up or Course Up orientiation within the Radar Application
- Radar Overlay within the Chart Application .. may be used with COG alone ... requires that the vessel be underway and making way.
- Heading Vector within the Chart Application
- Vessel Icon Orientation within the Chart Application (will default to COG when no heading data source is detected)
- Chart Orientation within the Chart Application (will default to COG when no heading data source is detected ... when not moving or operating at maneuvering speeds, the Chart orientation will revert to North Up unless the system is interfaced to a source of heading data)
- Heading Databar and Data application data items
- Other heading dependent features.

RAYFAQ#