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Worksheet 171 · Skill 6

Course to steer

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  1. You are at 100°T, 1.6 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 8.3 kn. The current sets 198°T at 1.1 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 017°T, 0.8 nm from Kittle water tank, bound for Green can "3". Your speed through the water is 10.8 kn. The current sets 068°T at 1.3 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  

  3. You are at 103°T, 1.6 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 7.4 kn. The current sets 332°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 292°T, 2.8 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 8.3 kn. The current sets 321°T at 0.8 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  

  5. You are at 043°T, 3.1 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 10.8 kn. The current sets 066°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  

  6. You are at 060°T, 1.3 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 10.0 kn. The current sets 067°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  

  7. You are at 305°T, 4.3 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 5.7 kn. The current sets 245°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  

  8. You are at 042°T, 4.0 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 9.1 kn. The current sets 255°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: 086 °T
Speed over the ground: 7.9 kn
Time to the mark: 30 min
No. 171001 (worked solution)
2Course to steer: 296 °T
Speed over the ground: 10.0 kn
Time to the mark: 36 min
No. 171002 (worked solution)
3Course to steer: 133 °T
Speed over the ground: 5.8 kn
Time to the mark: 28 min
No. 171003 (worked solution)
4Course to steer: 092 °T
Speed over the ground: 7.8 kn
Time to the mark: 51 min
No. 171004 (worked solution)
5Course to steer: 136 °T
Speed over the ground: 11.4 kn
Time to the mark: 23 min
No. 171005 (worked solution)
6Course to steer: 130 °T
Speed over the ground: 10.8 kn
Time to the mark: 21 min
No. 171006 (worked solution)
7Course to steer: 163 °T
Speed over the ground: 6.0 kn
Time to the mark: 50 min
No. 171007 (worked solution)
8Course to steer: 150 °T
Speed over the ground: 8.8 kn
Time to the mark: 32 min
No. 171008 (worked solution)