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Worksheet 183 · Skill 6

Course to steer

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  1. You are at 018°T, 2.7 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 9.6 kn. The current sets 037°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  

  2. You are at 193°T, 1.3 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 10.3 kn. The current sets 289°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  

  3. You are at 253°T, 2.2 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 11.3 kn. The current sets 110°T at 2.0 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  

  4. You are at 237°T, 1.6 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 11.9 kn. The current sets 035°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  

  5. You are at 020°T, 1.8 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 11.2 kn. The current sets 222°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 296°T, 2.1 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 9.7 kn. The current sets 296°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  

  7. You are at 019°T, 3.3 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 6.6 kn. The current sets 347°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  

  8. You are at 032°T, 3.9 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 9.6 kn. The current sets 255°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  

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: 154 °T
Speed over the ground: 9.2 kn
Time to the mark: 35 min
No. 183001 (worked solution)
2Course to steer: 232 °T
Speed over the ground: 11.6 kn
Time to the mark: 19 min
No. 183002 (worked solution)
3Course to steer: 221 °T
Speed over the ground: 10.7 kn
Time to the mark: 16 min
No. 183003 (worked solution)
4Course to steer: 264 °T
Speed over the ground: 10.5 kn
Time to the mark: 23 min
No. 183004 (worked solution)
5Course to steer: 252 °T
Speed over the ground: 12.3 kn
Time to the mark: 31 min
No. 183005 (worked solution)
6Course to steer: 172 °T
Speed over the ground: 9.3 kn
Time to the mark: 16 min
No. 183006 (worked solution)
7Course to steer: 149 °T
Speed over the ground: 5.3 kn
Time to the mark: 63 min
No. 183007 (worked solution)
8Course to steer: 155 °T
Speed over the ground: 9.5 kn
Time to the mark: 35 min
No. 183008 (worked solution)