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Worksheet 47 · Skill 6

Course to steer

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  1. You are at 146°T, 1.5 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.8 kn. The current sets 244°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 264°T, 1.4 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 7.3 kn. The current sets 040°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  

  3. You are at 041°T, 2.4 nm from Mill stack, bound for Green can "1". Your speed through the water is 6.9 kn. The current sets 351°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 194°T, 1.5 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 9.8 kn. The current sets 358°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  

  5. You are at 282°T, 2.2 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 6.3 kn. The current sets 253°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  

  6. You are at 215°T, 1.1 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 9.4 kn. The current sets 254°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  

  7. You are at 020°T, 1.6 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 8.3 kn. The current sets 196°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 307°T, 3.9 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 7.9 kn. The current sets 082°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  

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: 287 °T
Speed over the ground: 8.7 kn
Time to the mark: 43 min
No. 47001 (worked solution)
2Course to steer: 255 °T
Speed over the ground: 6.1 kn
Time to the mark: 40 min
No. 47002 (worked solution)
3Course to steer: 282 °T
Speed over the ground: 7.5 kn
Time to the mark: 29 min
No. 47003 (worked solution)
4Course to steer: 235 °T
Speed over the ground: 8.7 kn
Time to the mark: 19 min
No. 47004 (worked solution)
5Course to steer: 158 °T
Speed over the ground: 6.3 kn
Time to the mark: 20 min
No. 47005 (worked solution)
6Course to steer: 313 °T
Speed over the ground: 10.8 kn
Time to the mark: 19 min
No. 47006 (worked solution)
7Course to steer: 271 °T
Speed over the ground: 8.8 kn
Time to the mark: 28 min
No. 47007 (worked solution)
8Course to steer: 102 °T
Speed over the ground: 9.8 kn
Time to the mark: 44 min
No. 47008 (worked solution)