Getting Engine Data onto your Instruments Introduction The Nanni engines on our catamaran use the Nanni SI.4 digital control panel. It is connected to the engine with several cable bundles. One of them is a J1939 bus, which is used to constantly send engine data when the engine is running. This includes the following data: engine RPM engine hours engine water temperature engine oil pressure tank level (only if a tank sender is connected to two wires on the back of the engine panel trouble events (over-heating, etc.) Why Do this? There are two main reasons I can see to do this. One is just as simple as getting the above information added to and therefore available from NMEA. This allows to be inside at our Nav Station and see all of this information about the engines without having to go outside, which can be great in inclement weather. The more compelling reason, in my opinion comes into play when you have a PredictWind DataHub and their professional level subscription...
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