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Worksheet 406 · Skill 6

Course to steer

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  1. You are at 041°T, 3.4 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 11.2 kn. The current sets 046°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  

  2. You are at 031°T, 2.3 nm from Heron Point Light, bound for Green can "3". Your speed through the water is 9.9 kn. The current sets 192°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  

  3. You are at 219°T, 2.5 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 8.2 kn. The current sets 045°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  

  4. You are at 022°T, 2.2 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 8.8 kn. The current sets 319°T at 0.9 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  

  5. You are at 048°T, 3.3 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 7.0 kn. The current sets 042°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 270°T, 1.6 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 5.9 kn. The current sets 265°T at 1.0 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  

  7. You are at 033°T, 2.8 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 10.6 kn. The current sets 198°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  

  8. You are at 271°T, 2.4 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 11.3 kn. The current sets 159°T at 1.0 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  

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: 160 °T
Speed over the ground: 10.7 kn
Time to the mark: 25 min
No. 406001 (worked solution)
2Course to steer: 060 °T
Speed over the ground: 8.8 kn
Time to the mark: 18 min
No. 406002 (worked solution)
3Course to steer: 277 °T
Speed over the ground: 7.1 kn
Time to the mark: 34 min
No. 406003 (worked solution)
4Course to steer: 107 °T
Speed over the ground: 8.1 kn
Time to the mark: 24 min
No. 406004 (worked solution)
5Course to steer: 171 °T
Speed over the ground: 5.8 kn
Time to the mark: 42 min
No. 406005 (worked solution)
6Course to steer: 205 °T
Speed over the ground: 6.5 kn
Time to the mark: 34 min
No. 406006 (worked solution)
7Course to steer: 259 °T
Speed over the ground: 11.8 kn
Time to the mark: 34 min
No. 406007 (worked solution)
8Course to steer: 263 °T
Speed over the ground: 11.1 kn
Time to the mark: 17 min
No. 406008 (worked solution)