Dividers: drag from one point to another on the chart

Start a drag on a charted object or buoy and it snaps to it. The readout gives the true bearing (and magnetic, 7°W) from where you start to where you are, and the distance in nautical miles.

Skill 3 · Dead reckoningProblem 723007

Two legs from a 1200 fix: where is the 1235 DR?

At 1200 you fix your position 359°T, 3.1 nm from Mill stack. You steer 334°T at 7.8 kn until 1225, then 026°T at 7.9 kn until 1235.

Give the 1235 DR position as the true bearing FROM Tern Island tower to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

Tolerance: 2° and 0.15 nm (or 4 % of the distance).

Given
1200 fix	359°T, 3.1 nm from Mill stack
Leg 1	334°T, 7.8 kn, 1200 to 1225
Leg 2	026°T, 7.9 kn, 1225 to 1235

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