A chart with north-south meridians. A planned track is drawn from a start point. Measured from true north, along the meridians as a map or planning app shows it, the track is 045 degrees true. Magnetic north is drawn 11 degrees east of true north (an example variation). Measured from magnetic north, as a compass reads it, the same line is 034 degrees magnetic. The T and M suffixes are then highlighted: the same line has two numbers, so always record which reference a direction uses. Example values; use current charts and published data for real operations.
