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Worksheet 486 · Skill 6

Course to steer

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  1. You are at 286°T, 3.1 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 9.4 kn. The current sets 218°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 067°T, 2.8 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 10.6 kn. The current sets 092°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 012°T, 2.0 nm from Mill stack, bound for Red nun "2". Your speed through the water is 9.1 kn. The current sets 341°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  

  4. You are at 301°T, 3.5 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 5.6 kn. The current sets 261°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  

  5. You are at 152°T, 1.6 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 9.4 kn. The current sets 154°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  

  6. You are at 316°T, 3.4 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 5.5 kn. The current sets 033°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 062°T, 3.1 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 10.5 kn. The current sets 266°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  

  8. You are at 050°T, 2.8 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 5.4 kn. The current sets 243°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  

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: 186 °T
Speed over the ground: 10.3 kn
Time to the mark: 23 min
No. 486001 (worked solution)
2Course to steer: 152 °T
Speed over the ground: 11.5 kn
Time to the mark: 16 min
No. 486002 (worked solution)
3Course to steer: 314 °T
Speed over the ground: 10.2 kn
Time to the mark: 14 min
No. 486003 (worked solution)
4Course to steer: 174 °T
Speed over the ground: 5.7 kn
Time to the mark: 46 min
No. 486004 (worked solution)
5Course to steer: 009 °T
Speed over the ground: 8.1 kn
Time to the mark: 40 min
No. 486005 (worked solution)
6Course to steer: 183 °T
Speed over the ground: 4.1 kn
Time to the mark: 60 min
No. 486006 (worked solution)
7Course to steer: 143 °T
Speed over the ground: 9.7 kn
Time to the mark: 20 min
No. 486007 (worked solution)
8Course to steer: 261 °T
Speed over the ground: 7.6 kn
Time to the mark: 56 min
No. 486008 (worked solution)