RMC Recommended Minimum Specific GPS/Transit data
RMC is the recommended minimum data to be provided by a GPS or Transit receiver. Time, date position, course and speed data are provided by a GPS or TRANSIT navigation receiver. A check sum is mandatory. This data string should be transmitted at speeds of 1 hertz when used with the IPS. All data fields must be provided, null fields should be used only when the data is temporarily unavailable.
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RMC,220516,A,5133.82,N,00042.24,W,173.8,231.8,130694,004.2,W*70
1. Time Stamp 220516 22:05:16 UTC
1. A validity - A-ok, V-invalid
1. 5133.82 current Latitude
1. N North/South
1. 00042.24 current Longitude
1. W East/West
1. 173.8 Speed in knots
1. 231.8 True course
1. 130694 Date Stamp
1. 004.2 Variation
1. W East/West
1. *70 checksum