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Worksheet 271 · Skill 6

Course to steer

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  1. You are at 193°T, 1.3 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 9.7 kn. The current sets 053°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  

  2. You are at 300°T, 3.8 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 5.8 kn. The current sets 089°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  

  3. You are at 023°T, 2.9 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 8.5 kn. The current sets 203°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  

  4. You are at 060°T, 2.2 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 9.1 kn. The current sets 254°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 042°T, 3.6 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 6.7 kn. The current sets 200°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  

  6. You are at 043°T, 3.3 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 7.9 kn. The current sets 109°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  

  7. You are at 110°T, 1.5 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 5.8 kn. The current sets 336°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 040°T, 2.3 nm from Mill stack, bound for Red nun "2". Your speed through the water is 5.1 kn. The current sets 235°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: 275 °T
Speed over the ground: 8.1 kn
Time to the mark: 35 min
No. 271001 (worked solution)
2Course to steer: 189 °T
Speed over the ground: 5.7 kn
Time to the mark: 53 min
No. 271002 (worked solution)
3Course to steer: 111 °T
Speed over the ground: 8.7 kn
Time to the mark: 38 min
No. 271003 (worked solution)
4Course to steer: 141 °T
Speed over the ground: 8.7 kn
Time to the mark: 25 min
No. 271004 (worked solution)
5Course to steer: 161 °T
Speed over the ground: 7.3 kn
Time to the mark: 40 min
No. 271005 (worked solution)
6Course to steer: 258 °T
Speed over the ground: 6.6 kn
Time to the mark: 68 min
No. 271006 (worked solution)
7Course to steer: 077 °T
Speed over the ground: 5.8 kn
Time to the mark: 33 min
No. 271007 (worked solution)
8Course to steer: 329 °T
Speed over the ground: 5.4 kn
Time to the mark: 37 min
No. 271008 (worked solution)