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Worksheet 474 · Skill 6

Course to steer

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  1. You are at 118°T, 1.6 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 5.2 kn. The current sets 034°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  

  2. You are at 287°T, 1.6 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 11.7 kn. The current sets 096°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  

  3. You are at 287°T, 1.3 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 6.9 kn. The current sets 116°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  

  4. You are at 042°T, 1.4 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 7.3 kn. The current sets 198°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  

  5. You are at 002°T, 1.4 nm from Heron Point Light, bound for Green can "3". Your speed through the water is 11.6 kn. The current sets 141°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 032°T, 3.6 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 5.3 kn. The current sets 063°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  

  7. You are at 035°T, 3.7 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 11.5 kn. The current sets 266°T at 2.2 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  

  8. You are at 161°T, 1.6 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 11.1 kn. The current sets 154°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  

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: 116 °T
Speed over the ground: 5.5 kn
Time to the mark: 32 min
No. 474001 (worked solution)
2Course to steer: 221 °T
Speed over the ground: 10.5 kn
Time to the mark: 24 min
No. 474002 (worked solution)
3Course to steer: 199 °T
Speed over the ground: 7.0 kn
Time to the mark: 17 min
No. 474003 (worked solution)
4Course to steer: 134 °T
Speed over the ground: 7.5 kn
Time to the mark: 33 min
No. 474004 (worked solution)
5Course to steer: 056 °T
Speed over the ground: 12.1 kn
Time to the mark: 20 min
No. 474005 (worked solution)
6Course to steer: 157 °T
Speed over the ground: 5.3 kn
Time to the mark: 57 min
No. 474006 (worked solution)
7Course to steer: 144 °T
Speed over the ground: 10.5 kn
Time to the mark: 28 min
No. 474007 (worked solution)
8Course to steer: 093 °T
Speed over the ground: 11.8 kn
Time to the mark: 16 min
No. 474008 (worked solution)