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Worksheet 157 · Skill 6

Course to steer

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  1. You are at 107°T, 1.9 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 7.6 kn. The current sets 137°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 351°T, 2.2 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 11.3 kn. The current sets 339°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  

  3. You are at 025°T, 3.4 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 10.3 kn. The current sets 022°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  

  4. You are at 295°T, 2.7 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 9.7 kn. The current sets 276°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 292°T, 3.7 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 5.9 kn. The current sets 183°T at 2.4 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 044°T, 3.6 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 8.2 kn. The current sets 035°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  

  7. You are at 256°T, 2.2 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 8.5 kn. The current sets 356°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  

  8. You are at 225°T, 1.7 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.9 kn. The current sets 336°T at 1.4 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: 266 °T
Speed over the ground: 6.3 kn
Time to the mark: 49 min
No. 157001 (worked solution)
2Course to steer: 206 °T
Speed over the ground: 10.8 kn
Time to the mark: 30 min
No. 157002 (worked solution)
3Course to steer: 166 °T
Speed over the ground: 8.4 kn
Time to the mark: 40 min
No. 157003 (worked solution)
4Course to steer: 185 °T
Speed over the ground: 9.8 kn
Time to the mark: 27 min
No. 157004 (worked solution)
5Course to steer: 137 °T
Speed over the ground: 7.8 kn
Time to the mark: 27 min
No. 157005 (worked solution)
6Course to steer: 140 °T
Speed over the ground: 8.1 kn
Time to the mark: 33 min
No. 157006 (worked solution)
7Course to steer: 205 °T
Speed over the ground: 7.5 kn
Time to the mark: 24 min
No. 157007 (worked solution)
8Course to steer: 268 °T
Speed over the ground: 7.5 kn
Time to the mark: 34 min
No. 157008 (worked solution)