G Series speed data input

[Chuck - Raymarine - Moderator]

David,

"SOG" is not calculated from motion sensed by a paddlewheel. "SOG" is calculated by the GPS sensor. The "Speed" data item (better termed Speed Through Water) is calculated by an instrument or fishfinding device which is in turn interfaced to a transducer featuring a speed through water sensor (paddle wheel). The Databar of your MFD clearly lists that is has been configured to display the "Speed" data item (listed within the Vessel data group). This need to be changed to instead display the "COG / SOG" data item (listed within the Vessel data group).