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Plot Log
Practice Sheet No. 1, Heron Sound (invented, not for navigation) 34 41 22 38 29 18 27 44 12 21 19 N VAR 7°W (invented) Heron Sound Heron Point Tern Island Westfield Kittle Gannet Rock Fl W 4s 52ft 14M TR TANK SPIRE STACK Dbn 1 2 3 HS 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Border scale: nautical miles (1 nm = 10 ticks) PRACTICE SHEET No. 1 · HERON SOUNDInvented for practice · NOT FOR NAVIGATION · Plotroom Start
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 6 · Course to steerProblem 81001

Steer for Green can "3" across a 2.0-knot current.

You are at 080°T, 3.7 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 9.2 kn. The current sets 164°T at 2.0 kn.

Find the true course to steer that keeps you on the straight track to the buoy, your speed over the ground, and how many minutes it will take.

Tolerance: 3° (the track is measured on the chart), 0.3 kn and 3 minutes (or 5 %).

Given
Start080°T, 3.7 nm from Westfield church spire
MarkGreen can "3"
Speed through the water9.2 kn
Currentsets 164°T, drift 2.0 kn
°T
kn
min
New problem

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