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 588005

Two legs from a 1230 fix: where is the 1305 DR?

At 1230 you fix your position 002°T, 3.1 nm from Mill stack. You steer 341°T at 6.8 kn until 1240, then 150°T at 6.1 kn until 1305.

Give the 1305 DR position as the true bearing FROM Mill stack 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
1230 fix	002°T, 3.1 nm from Mill stack
Leg 1	341°T, 6.8 kn, 1230 to 1240
Leg 2	150°T, 6.1 kn, 1240 to 1305

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