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Worksheet 161 · Skill 6

Course to steer

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  1. You are at 288°T, 3.7 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 8.4 kn. The current sets 340°T at 1.7 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 %).

    Course to steer: ________ °T   Speed over the ground: ________ kn   Time to the mark: ________ min  

  2. You are at 135°T, 1.6 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 5.5 kn. The current sets 043°T at 1.5 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 %).

    Course to steer: ________ °T   Speed over the ground: ________ kn   Time to the mark: ________ min  

  3. You are at 343°T, 2.0 nm from Mill stack, bound for Green can "3". Your speed through the water is 6.4 kn. The current sets 087°T at 1.7 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 %).

    Course to steer: ________ °T   Speed over the ground: ________ kn   Time to the mark: ________ min  

  4. You are at 318°T, 1.3 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 5.3 kn. The current sets 177°T at 2.4 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 %).

    Course to steer: ________ °T   Speed over the ground: ________ kn   Time to the mark: ________ min  

  5. You are at 111°T, 1.3 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 7.6 kn. The current sets 114°T at 2.3 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 %).

    Course to steer: ________ °T   Speed over the ground: ________ kn   Time to the mark: ________ min  

  6. You are at 328°T, 2.9 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 11.7 kn. The current sets 244°T at 1.2 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 %).

    Course to steer: ________ °T   Speed over the ground: ________ kn   Time to the mark: ________ min  

  7. You are at 100°T, 2.4 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 9.2 kn. The current sets 051°T at 0.5 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 %).

    Course to steer: ________ °T   Speed over the ground: ________ kn   Time to the mark: ________ min  

  8. You are at 268°T, 1.6 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 5.1 kn. The current sets 011°T at 1.6 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 %).

    Course to steer: ________ °T   Speed over the ground: ________ kn   Time to the mark: ________ min  

Practice Sheet No. 1

Practice Sheet No. 1 with the starting fixes of this worksheet 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 Start Start Start Start Start Start Start

Answer key

No.AnswersProblem
1Course to steer: 177 °T
Speed over the ground: 6.8 kn
Time to the mark: 37 min
No. 161001 (worked solution)
2Course to steer: 267 °T
Speed over the ground: 4.6 kn
Time to the mark: 80 min
No. 161002 (worked solution)
3Course to steer: 000 °T
Speed over the ground: 6.7 kn
Time to the mark: 25 min
No. 161003 (worked solution)
4Course to steer: 230 °T
Speed over the ground: 7.0 kn
Time to the mark: 42 min
No. 161004 (worked solution)
5Course to steer: 356 °T
Speed over the ground: 6.8 kn
Time to the mark: 39 min
No. 161005 (worked solution)
6Course to steer: 196 °T
Speed over the ground: 12.5 kn
Time to the mark: 28 min
No. 161006 (worked solution)
7Course to steer: 143 °T
Speed over the ground: 9.2 kn
Time to the mark: 14 min
No. 161007 (worked solution)
8Course to steer: 055 °T
Speed over the ground: 6.4 kn
Time to the mark: 51 min
No. 161008 (worked solution)