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Worksheet 193 · Skill 6

Course to steer

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  1. You are at 257°T, 1.8 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 7.3 kn. The current sets 146°T at 0.6 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  

  2. You are at 335°T, 1.9 nm from Heron Point Light, bound for Green can "1". Your speed through the water is 5.5 kn. The current sets 017°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 026°T, 1.7 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 5.1 kn. The current sets 228°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  

  4. You are at 151°T, 0.9 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 8.1 kn. The current sets 213°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  

  5. You are at 092°T, 3.6 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 10.8 kn. The current sets 199°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  

  6. You are at 056°T, 1.4 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 12.0 kn. The current sets 100°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 247°T, 2.8 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 6.8 kn. The current sets 268°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 082°T, 1.6 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 6.9 kn. The current sets 156°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  

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: 219 °T
Speed over the ground: 7.5 kn
Time to the mark: 26 min
No. 193001 (worked solution)
2Course to steer: 114 °T
Speed over the ground: 5.5 kn
Time to the mark: 28 min
No. 193002 (worked solution)
3Course to steer: 259 °T
Speed over the ground: 6.7 kn
Time to the mark: 58 min
No. 193003 (worked solution)
4Course to steer: 090 °T
Speed over the ground: 7.4 kn
Time to the mark: 32 min
No. 193004 (worked solution)
5Course to steer: 087 °T
Speed over the ground: 10.1 kn
Time to the mark: 12 min
No. 193005 (worked solution)
6Course to steer: 015 °T
Speed over the ground: 12.1 kn
Time to the mark: 16 min
No. 193006 (worked solution)
7Course to steer: 195 °T
Speed over the ground: 7.4 kn
Time to the mark: 18 min
No. 193007 (worked solution)
8Course to steer: 054 °T
Speed over the ground: 6.8 kn
Time to the mark: 23 min
No. 193008 (worked solution)