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Worksheet 851 · Skill 6

Course to steer

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  1. You are at 020°T, 1.6 nm from Heron Point Light, bound for Green can "3". Your speed through the water is 11.3 kn. The current sets 280°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 326°T, 1.7 nm from Kittle water tank, bound for Bell buoy "HS". Your speed through the water is 9.1 kn. The current sets 082°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 203°T, 2.3 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 7.8 kn. The current sets 003°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 033°T, 1.2 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 7.7 kn. The current sets 282°T at 1.9 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  

  5. You are at 034°T, 2.4 nm from Mill stack, bound for Green can "3". Your speed through the water is 6.2 kn. The current sets 221°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  

  6. You are at 009°T, 2.5 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 7.6 kn. The current sets 129°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  

  7. You are at 013°T, 1.6 nm from Heron Point Light, bound for Red nun "2". Your speed through the water is 11.2 kn. The current sets 285°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  

  8. You are at 015°T, 3.3 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 9.1 kn. The current sets 276°T at 2.1 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  

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: 069 °T
Speed over the ground: 10.4 kn
Time to the mark: 20 min
No. 851001 (worked solution)
2Course to steer: 011 °T
Speed over the ground: 9.6 kn
Time to the mark: 36 min
No. 851002 (worked solution)
3Course to steer: 279 °T
Speed over the ground: 8.0 kn
Time to the mark: 35 min
No. 851003 (worked solution)
4Course to steer: 254 °T
Speed over the ground: 9.4 kn
Time to the mark: 35 min
No. 851004 (worked solution)
5Course to steer: 355 °T
Speed over the ground: 4.8 kn
Time to the mark: 36 min
No. 851005 (worked solution)
6Course to steer: 103 °T
Speed over the ground: 9.2 kn
Time to the mark: 25 min
No. 851006 (worked solution)
7Course to steer: 082 °T
Speed over the ground: 9.4 kn
Time to the mark: 13 min
No. 851007 (worked solution)
8Course to steer: 140 °T
Speed over the ground: 7.7 kn
Time to the mark: 46 min
No. 851008 (worked solution)