Maretron Support Knowledge Base :: I see that Maretron's DSM200 and DSM250 displays have a SSC200 configuration setting called "Variation Source:", what is this?
Maretron's DSM200 and DSM250 displays have a SSC200 configuration setting called "Variation Source:", which is used to tell the compass where it should receive the magnetic variation for subsequent transmission of the heading (HDT) sentence over the NMEA 0183 interface.