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Worksheet 123 · Skill 6

Course to steer

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  1. You are at 114°T, 1.5 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 5.0 kn. The current sets 157°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 340°T, 1.5 nm from Kittle water tank, bound for Green can "3". Your speed through the water is 6.2 kn. The current sets 268°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  

  3. You are at 309°T, 3.6 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 11.0 kn. The current sets 102°T at 2.1 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  

  4. You are at 010°T, 3.2 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 6.5 kn. The current sets 120°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  

  5. You are at 038°T, 2.9 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 5.8 kn. The current sets 066°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, 2.1 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 6.4 kn. The current sets 125°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  

  7. You are at 358°T, 1.3 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 8.2 kn. The current sets 131°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  

  8. You are at 191°T, 2.0 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 10.0 kn. The current sets 267°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  

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: 263 °T
Speed over the ground: 4.8 kn
Time to the mark: 69 min
No. 123001 (worked solution)
2Course to steer: 309 °T
Speed over the ground: 7.8 kn
Time to the mark: 39 min
No. 123002 (worked solution)
3Course to steer: 193 °T
Speed over the ground: 11.2 kn
Time to the mark: 26 min
No. 123003 (worked solution)
4Course to steer: 145 °T
Speed over the ground: 7.9 kn
Time to the mark: 45 min
No. 123004 (worked solution)
5Course to steer: 169 °T
Speed over the ground: 5.8 kn
Time to the mark: 47 min
No. 123005 (worked solution)
6Course to steer: 213 °T
Speed over the ground: 6.5 kn
Time to the mark: 43 min
No. 123006 (worked solution)
7Course to steer: 265 °T
Speed over the ground: 7.1 kn
Time to the mark: 41 min
No. 123007 (worked solution)
8Course to steer: 058 °T
Speed over the ground: 8.7 kn
Time to the mark: 38 min
No. 123008 (worked solution)