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 648006

Two legs from a 1330 fix: where is the 1410 DR?

At 1330 you fix your position 002°T, 1.7 nm from Mill stack. You steer 099°T at 8.9 kn until 1350, then 356°T at 7.7 kn until 1410.

Give the 1410 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
1330 fix	002°T, 1.7 nm from Mill stack
Leg 1	099°T, 8.9 kn, 1330 to 1350
Leg 2	356°T, 7.7 kn, 1350 to 1410

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