Data from KVH Autocomp 1000S Compass:

Format:

    YYYY/MM/DD HH:MM, DDD.D

    where YYYY/MM/DD = Date as year, month, day
          HH:MM      = Time (UTC) as hour, minute
          DDD.D      = Average compass value

Compass is measured every 5 seconds and averaged over a 2 minute interval