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Worksheet 153 · Skill 6

Course to steer

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  1. You are at 011°T, 3.1 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 7.3 kn. The current sets 051°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  

  2. You are at 272°T, 1.8 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 12.0 kn. The current sets 357°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  

  3. You are at 307°T, 4.1 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 8.0 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  

  4. You are at 113°T, 2.1 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 11.8 kn. The current sets 149°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  

  5. You are at 048°T, 1.7 nm from Heron Point Light, bound for Green can "3". Your speed through the water is 8.3 kn. The current sets 164°T at 1.3 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  

  6. You are at 221°T, 2.4 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 8.9 kn. The current sets 139°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  

  7. You are at 346°T, 1.3 nm from Heron Point Light, bound for Red nun "2". Your speed through the water is 6.4 kn. The current sets 094°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  

  8. You are at 093°T, 1.7 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 11.7 kn. The current sets 087°T at 0.8 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  

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: 146 °T
Speed over the ground: 7.3 kn
Time to the mark: 48 min
No. 153001 (worked solution)
2Course to steer: 256 °T
Speed over the ground: 11.9 kn
Time to the mark: 18 min
No. 153002 (worked solution)
3Course to steer: 168 °T
Speed over the ground: 9.1 kn
Time to the mark: 29 min
No. 153003 (worked solution)
4Course to steer: 078 °T
Speed over the ground: 12.4 kn
Time to the mark: 18 min
No. 153004 (worked solution)
5Course to steer: 046 °T
Speed over the ground: 7.8 kn
Time to the mark: 23 min
No. 153005 (worked solution)
6Course to steer: 245 °T
Speed over the ground: 8.7 kn
Time to the mark: 17 min
No. 153006 (worked solution)
7Course to steer: 070 °T
Speed over the ground: 7.8 kn
Time to the mark: 22 min
No. 153007 (worked solution)
8Course to steer: 004 °T
Speed over the ground: 11.8 kn
Time to the mark: 20 min
No. 153008 (worked solution)