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Worksheet 478 · Skill 6

Course to steer

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  1. You are at 020°T, 1.6 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 11.1 kn. The current sets 147°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  

  2. You are at 151°T, 2.4 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 5.9 kn. The current sets 057°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  

  3. You are at 114°T, 1.7 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 11.1 kn. The current sets 327°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 031°T, 2.4 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 5.0 kn. The current sets 098°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  

  5. You are at 317°T, 3.0 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 8.3 kn. The current sets 014°T at 1.2 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 066°T, 3.0 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 8.3 kn. The current sets 159°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 246°T, 2.5 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 11.5 kn. The current sets 205°T at 2.2 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 007°T, 1.5 nm from Kittle water tank, bound for Green can "1". Your speed through the water is 8.7 kn. The current sets 150°T at 1.2 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: 123 °T
Speed over the ground: 13.4 kn
Time to the mark: 21 min
No. 478001 (worked solution)
2Course to steer: 252 °T
Speed over the ground: 4.2 kn
Time to the mark: 70 min
No. 478002 (worked solution)
3Course to steer: 239 °T
Speed over the ground: 11.2 kn
Time to the mark: 30 min
No. 478003 (worked solution)
4Course to steer: 263 °T
Speed over the ground: 2.8 kn
Time to the mark: 135 min
No. 478004 (worked solution)
5Course to steer: 107 °T
Speed over the ground: 8.3 kn
Time to the mark: 44 min
No. 478005 (worked solution)
6Course to steer: 115 °T
Speed over the ground: 9.4 kn
Time to the mark: 21 min
No. 478006 (worked solution)
7Course to steer: 288 °T
Speed over the ground: 12.0 kn
Time to the mark: 16 min
No. 478007 (worked solution)
8Course to steer: 284 °T
Speed over the ground: 7.9 kn
Time to the mark: 53 min
No. 478008 (worked solution)