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Worksheet 631 · Skill 6

Course to steer

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  1. You are at 202°T, 1.9 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 10.6 kn. The current sets 308°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 059°T, 2.4 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 10.9 kn. The current sets 060°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  

  3. You are at 032°T, 4.1 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 9.6 kn. The current sets 002°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  

  4. You are at 143°T, 1.2 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 7.9 kn. The current sets 028°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  

  5. You are at 027°T, 1.2 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 7.0 kn. The current sets 115°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  

  6. You are at 280°T, 3.3 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 8.1 kn. The current sets 129°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  

  7. You are at 171°T, 1.1 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 7.0 kn. The current sets 057°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  

  8. You are at 025°T, 2.3 nm from Mill stack, bound for Green can "1". Your speed through the water is 5.0 kn. The current sets 242°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  

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: 280 °T
Speed over the ground: 12.2 kn
Time to the mark: 24 min
No. 631001 (worked solution)
2Course to steer: 256 °T
Speed over the ground: 8.9 kn
Time to the mark: 47 min
No. 631002 (worked solution)
3Course to steer: 162 °T
Speed over the ground: 7.5 kn
Time to the mark: 43 min
No. 631003 (worked solution)
4Course to steer: 265 °T
Speed over the ground: 6.9 kn
Time to the mark: 49 min
No. 631004 (worked solution)
5Course to steer: 016 °T
Speed over the ground: 6.9 kn
Time to the mark: 28 min
No. 631005 (worked solution)
6Course to steer: 149 °T
Speed over the ground: 10.2 kn
Time to the mark: 16 min
No. 631006 (worked solution)
7Course to steer: 278 °T
Speed over the ground: 6.5 kn
Time to the mark: 47 min
No. 631007 (worked solution)
8Course to steer: 307 °T
Speed over the ground: 6.1 kn
Time to the mark: 29 min
No. 631008 (worked solution)