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Worksheet 185 · Skill 6

Course to steer

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  1. You are at 343°T, 0.9 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 10.4 kn. The current sets 292°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  

  2. You are at 295°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 245°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  

  3. You are at 133°T, 1.0 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 9.4 kn. The current sets 351°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  

  4. You are at 023°T, 1.6 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 10.7 kn. The current sets 257°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  

  5. You are at 280°T, 2.6 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 11.0 kn. The current sets 226°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  

  6. You are at 270°T, 3.0 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 11.4 kn. The current sets 258°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  

  7. You are at 286°T, 3.1 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 10.4 kn. The current sets 346°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  

  8. You are at 007°T, 1.0 nm from Kittle water tank, bound for Red nun "2". Your speed through the water is 11.5 kn. The current sets 348°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  

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: 252 °T
Speed over the ground: 12.3 kn
Time to the mark: 22 min
No. 185001 (worked solution)
2Course to steer: 193 °T
Speed over the ground: 9.8 kn
Time to the mark: 27 min
No. 185002 (worked solution)
3Course to steer: 257 °T
Speed over the ground: 9.5 kn
Time to the mark: 39 min
No. 185003 (worked solution)
4Course to steer: 120 °T
Speed over the ground: 9.4 kn
Time to the mark: 30 min
No. 185004 (worked solution)
5Course to steer: 148 °T
Speed over the ground: 11.5 kn
Time to the mark: 12 min
No. 185005 (worked solution)
6Course to steer: 187 °T
Speed over the ground: 11.7 kn
Time to the mark: 16 min
No. 185006 (worked solution)
7Course to steer: 185 °T
Speed over the ground: 8.9 kn
Time to the mark: 27 min
No. 185007 (worked solution)
8Course to steer: 278 °T
Speed over the ground: 12.4 kn
Time to the mark: 32 min
No. 185008 (worked solution)