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Worksheet 247 · Skill 6

Course to steer

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  1. You are at 292°T, 2.4 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 8.1 kn. The current sets 026°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  

  2. You are at 048°T, 3.0 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 6.0 kn. The current sets 311°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  

  3. You are at 043°T, 2.9 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 9.9 kn. The current sets 101°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  

  4. You are at 010°T, 3.4 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 5.0 kn. The current sets 224°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  

  5. You are at 011°T, 1.9 nm from Mill stack, bound for Red nun "2". Your speed through the water is 7.1 kn. The current sets 059°T at 0.7 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  

  6. You are at 023°T, 3.4 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 8.0 kn. The current sets 267°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  

  7. You are at 109°T, 2.1 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 11.8 kn. The current sets 153°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 260°T, 2.1 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 10.6 kn. The current sets 247°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  

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: 176 °T
Speed over the ground: 6.5 kn
Time to the mark: 24 min
No. 247001 (worked solution)
2Course to steer: 246 °T
Speed over the ground: 6.5 kn
Time to the mark: 68 min
No. 247002 (worked solution)
3Course to steer: 151 °T
Speed over the ground: 10.6 kn
Time to the mark: 24 min
No. 247003 (worked solution)
4Course to steer: 120 °T
Speed over the ground: 4.9 kn
Time to the mark: 74 min
No. 247004 (worked solution)
5Course to steer: 314 °T
Speed over the ground: 7.0 kn
Time to the mark: 21 min
No. 247005 (worked solution)
6Course to steer: 142 °T
Speed over the ground: 7.1 kn
Time to the mark: 48 min
No. 247006 (worked solution)
7Course to steer: 359 °T
Speed over the ground: 10.3 kn
Time to the mark: 26 min
No. 247007 (worked solution)
8Course to steer: 201 °T
Speed over the ground: 12.4 kn
Time to the mark: 15 min
No. 247008 (worked solution)