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Worksheet 772 · Skill 6

Course to steer

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  1. You are at 033°T, 3.5 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 7.5 kn. The current sets 111°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  

  2. You are at 170°T, 0.9 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 9.5 kn. The current sets 326°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 034°T, 2.1 nm from Mill stack, bound for Green can "1". Your speed through the water is 8.2 kn. The current sets 020°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  

  4. You are at 135°T, 1.4 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 7.8 kn. The current sets 046°T at 1.6 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 070°T, 3.0 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 6.1 kn. The current sets 155°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  

  6. You are at 215°T, 1.7 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 10.2 kn. The current sets 217°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  

  7. You are at 280°T, 3.1 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 9.3 kn. The current sets 273°T at 0.6 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 210°T, 2.1 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 10.0 kn. The current sets 215°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  

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: 136 °T
Speed over the ground: 8.6 kn
Time to the mark: 35 min
No. 772001 (worked solution)
2Course to steer: 269 °T
Speed over the ground: 10.0 kn
Time to the mark: 33 min
No. 772002 (worked solution)
3Course to steer: 283 °T
Speed over the ground: 8.2 kn
Time to the mark: 24 min
No. 772003 (worked solution)
4Course to steer: 270 °T
Speed over the ground: 6.7 kn
Time to the mark: 52 min
No. 772004 (worked solution)
5Course to steer: 277 °T
Speed over the ground: 5.6 kn
Time to the mark: 67 min
No. 772005 (worked solution)
6Course to steer: 292 °T
Speed over the ground: 11.0 kn
Time to the mark: 24 min
No. 772006 (worked solution)
7Course to steer: 185 °T
Speed over the ground: 9.3 kn
Time to the mark: 24 min
No. 772007 (worked solution)
8Course to steer: 330 °T
Speed over the ground: 9.3 kn
Time to the mark: 24 min
No. 772008 (worked solution)