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Worksheet 173 · Skill 6

Course to steer

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  1. You are at 307°T, 2.8 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 6.0 kn. The current sets 289°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  

  2. You are at 042°T, 3.8 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 7.4 kn. The current sets 298°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 333°T, 1.6 nm from Heron Point Light, bound for Green can "3". Your speed through the water is 9.0 kn. The current sets 029°T at 2.5 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  

  4. You are at 142°T, 1.7 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 11.6 kn. The current sets 332°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  

  5. You are at 072°T, 2.5 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 9.9 kn. The current sets 146°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 031°T, 3.1 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 6.3 kn. The current sets 195°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  

  7. You are at 233°T, 1.6 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 8.6 kn. The current sets 242°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  

  8. You are at 014°T, 1.3 nm from Heron Point Light, bound for Green can "3". Your speed through the water is 8.6 kn. The current sets 001°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  

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: 155 °T
Speed over the ground: 4.9 kn
Time to the mark: 40 min
No. 173001 (worked solution)
2Course to steer: 159 °T
Speed over the ground: 6.5 kn
Time to the mark: 46 min
No. 173002 (worked solution)
3Course to steer: 082 °T
Speed over the ground: 10.7 kn
Time to the mark: 26 min
No. 173003 (worked solution)
4Course to steer: 112 °T
Speed over the ground: 10.1 kn
Time to the mark: 16 min
No. 173004 (worked solution)
5Course to steer: 276 °T
Speed over the ground: 8.6 kn
Time to the mark: 50 min
No. 173005 (worked solution)
6Course to steer: 144 °T
Speed over the ground: 7.8 kn
Time to the mark: 39 min
No. 173006 (worked solution)
7Course to steer: 280 °T
Speed over the ground: 9.7 kn
Time to the mark: 26 min
No. 173007 (worked solution)
8Course to steer: 071 °T
Speed over the ground: 9.0 kn
Time to the mark: 25 min
No. 173008 (worked solution)