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Worksheet 558 · Skill 6

Course to steer

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  1. You are at 084°T, 1.2 nm from Heron Point Light, bound for Red nun "2". Your speed through the water is 8.1 kn. The current sets 341°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  

  2. You are at 149°T, 1.4 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 12.0 kn. The current sets 308°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  

  3. You are at 272°T, 1.4 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 6.4 kn. The current sets 353°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  

  4. You are at 231°T, 2.4 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 9.5 kn. The current sets 342°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 005°T, 1.8 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 11.4 kn. The current sets 113°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  

  6. You are at 214°T, 2.9 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 5.3 kn. The current sets 174°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 277°T, 1.7 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 5.6 kn. The current sets 195°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  

  8. You are at 081°T, 1.3 nm from Heron Point Light, bound for Green can "3". Your speed through the water is 6.4 kn. The current sets 106°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  

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: 038 °T
Speed over the ground: 8.6 kn
Time to the mark: 16 min
No. 558001 (worked solution)
2Course to steer: 020 °T
Speed over the ground: 12.3 kn
Time to the mark: 25 min
No. 558002 (worked solution)
3Course to steer: 247 °T
Speed over the ground: 6.2 kn
Time to the mark: 33 min
No. 558003 (worked solution)
4Course to steer: 219 °T
Speed over the ground: 8.8 kn
Time to the mark: 16 min
No. 558004 (worked solution)
5Course to steer: 256 °T
Speed over the ground: 10.1 kn
Time to the mark: 31 min
No. 558005 (worked solution)
6Course to steer: 267 °T
Speed over the ground: 5.4 kn
Time to the mark: 23 min
No. 558006 (worked solution)
7Course to steer: 216 °T
Speed over the ground: 7.8 kn
Time to the mark: 29 min
No. 558007 (worked solution)
8Course to steer: 021 °T
Speed over the ground: 7.1 kn
Time to the mark: 31 min
No. 558008 (worked solution)