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Worksheet 77 · Skill 6

Course to steer

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  1. You are at 043°T, 2.4 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 7.8 kn. The current sets 310°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  

  2. You are at 109°T, 1.7 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 11.3 kn. The current sets 330°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  

  3. You are at 332°T, 0.9 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 5.3 kn. The current sets 104°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  

  4. You are at 130°T, 1.0 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 6.5 kn. The current sets 171°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  

  5. You are at 343°T, 2.4 nm from Mill stack, bound for Green can "3". Your speed through the water is 10.0 kn. The current sets 300°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 139°T, 2.5 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 6.9 kn. The current sets 005°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  

  7. You are at 287°T, 4.1 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 6.8 kn. The current sets 023°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 038°T, 1.2 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 5.1 kn. The current sets 188°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  

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: 245 °T
Speed over the ground: 8.6 kn
Time to the mark: 47 min
No. 77001 (worked solution)
2Course to steer: 259 °T
Speed over the ground: 12.3 kn
Time to the mark: 34 min
No. 77002 (worked solution)
3Course to steer: 267 °T
Speed over the ground: 3.8 kn
Time to the mark: 70 min
No. 77003 (worked solution)
4Course to steer: 110 °T
Speed over the ground: 6.9 kn
Time to the mark: 28 min
No. 77004 (worked solution)
5Course to steer: 025 °T
Speed over the ground: 10.1 kn
Time to the mark: 14 min
No. 77005 (worked solution)
6Course to steer: 253 °T
Speed over the ground: 6.5 kn
Time to the mark: 43 min
No. 77006 (worked solution)
7Course to steer: 146 °T
Speed over the ground: 6.5 kn
Time to the mark: 33 min
No. 77007 (worked solution)
8Course to steer: 080 °T
Speed over the ground: 4.9 kn
Time to the mark: 62 min
No. 77008 (worked solution)