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Worksheet 237 · Skill 6

Course to steer

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  1. You are at 349°T, 1.8 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 8.3 kn. The current sets 263°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  

  2. You are at 005°T, 2.7 nm from Mill stack, bound for Green can "1". Your speed through the water is 5.6 kn. The current sets 027°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  

  3. You are at 283°T, 3.7 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 7.1 kn. The current sets 243°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  

  4. You are at 338°T, 1.4 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 11.2 kn. The current sets 195°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  

  5. You are at 153°T, 2.5 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 5.6 kn. The current sets 018°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  

  6. You are at 219°T, 0.8 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 10.4 kn. The current sets 298°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  

  7. You are at 134°T, 0.8 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 6.5 kn. The current sets 048°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  

  8. You are at 322°T, 3.2 nm from Kittle water tank, bound for Green can "1". Your speed through the water is 8.8 kn. The current sets 068°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  

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: 209 °T
Speed over the ground: 8.9 kn
Time to the mark: 39 min
No. 237001 (worked solution)
2Course to steer: 269 °T
Speed over the ground: 5.2 kn
Time to the mark: 24 min
No. 237002 (worked solution)
3Course to steer: 160 °T
Speed over the ground: 7.4 kn
Time to the mark: 28 min
No. 237003 (worked solution)
4Course to steer: 271 °T
Speed over the ground: 11.8 kn
Time to the mark: 15 min
No. 237004 (worked solution)
5Course to steer: 258 °T
Speed over the ground: 5.2 kn
Time to the mark: 48 min
No. 237005 (worked solution)
6Course to steer: 264 °T
Speed over the ground: 12.5 kn
Time to the mark: 23 min
No. 237006 (worked solution)
7Course to steer: 011 °T
Speed over the ground: 8.5 kn
Time to the mark: 33 min
No. 237007 (worked solution)
8Course to steer: 265 °T
Speed over the ground: 7.4 kn
Time to the mark: 39 min
No. 237008 (worked solution)