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Worksheet 160 · Skill 6

Course to steer

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  1. You are at 105°T, 1.5 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 10.0 kn. The current sets 221°T at 0.6 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  

  2. You are at 315°T, 1.2 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 5.2 kn. The current sets 277°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  

  3. You are at 317°T, 2.7 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 8.8 kn. The current sets 138°T at 0.6 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  

  4. You are at 323°T, 3.0 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 7.9 kn. The current sets 223°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  

  5. You are at 031°T, 3.0 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 5.1 kn. The current sets 185°T at 1.9 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 321°T, 2.5 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 6.1 kn. The current sets 277°T at 1.8 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 069°T, 2.4 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 11.8 kn. The current sets 185°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 %).

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

  8. You are at 041°T, 1.7 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 12.0 kn. The current sets 063°T at 1.4 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  

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: 106 °T
Speed over the ground: 9.8 kn
Time to the mark: 19 min
No. 160001 (worked solution)
2Course to steer: 249 °T
Speed over the ground: 7.4 kn
Time to the mark: 33 min
No. 160002 (worked solution)
3Course to steer: 198 °T
Speed over the ground: 9.1 kn
Time to the mark: 30 min
No. 160003 (worked solution)
4Course to steer: 188 °T
Speed over the ground: 9.3 kn
Time to the mark: 33 min
No. 160004 (worked solution)
5Course to steer: 131 °T
Speed over the ground: 6.4 kn
Time to the mark: 45 min
No. 160005 (worked solution)
6Course to steer: 165 °T
Speed over the ground: 5.7 kn
Time to the mark: 37 min
No. 160006 (worked solution)
7Course to steer: 273 °T
Speed over the ground: 12.1 kn
Time to the mark: 35 min
No. 160007 (worked solution)
8Course to steer: 093 °T
Speed over the ground: 13.2 kn
Time to the mark: 13 min
No. 160008 (worked solution)