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Worksheet 215 · Skill 6

Course to steer

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  1. You are at 336°T, 2.4 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 5.3 kn. The current sets 284°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  

  2. You are at 310°T, 3.3 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 5.4 kn. The current sets 328°T at 0.5 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  

  3. You are at 318°T, 1.3 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 5.5 kn. The current sets 163°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  

  4. You are at 158°T, 1.2 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 11.8 kn. The current sets 088°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 049°T, 3.4 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 8.9 kn. The current sets 245°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  

  6. You are at 138°T, 1.2 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 11.9 kn. The current sets 109°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 007°T, 2.3 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 6.8 kn. The current sets 340°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  

  8. You are at 328°T, 1.5 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 12.0 kn. The current sets 278°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  

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: 187 °T
Speed over the ground: 5.3 kn
Time to the mark: 58 min
No. 215001 (worked solution)
2Course to steer: 188 °T
Speed over the ground: 5.0 kn
Time to the mark: 64 min
No. 215002 (worked solution)
3Course to steer: 024 °T
Speed over the ground: 4.0 kn
Time to the mark: 62 min
No. 215003 (worked solution)
4Course to steer: 247 °T
Speed over the ground: 10.2 kn
Time to the mark: 26 min
No. 215004 (worked solution)
5Course to steer: 155 °T
Speed over the ground: 9.0 kn
Time to the mark: 29 min
No. 215005 (worked solution)
6Course to steer: 081 °T
Speed over the ground: 14.1 kn
Time to the mark: 21 min
No. 215006 (worked solution)
7Course to steer: 121 °T
Speed over the ground: 5.2 kn
Time to the mark: 44 min
No. 215007 (worked solution)
8Course to steer: 244 °T
Speed over the ground: 13.5 kn
Time to the mark: 22 min
No. 215008 (worked solution)