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Worksheet 388 · Skill 6

Course to steer

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  1. You are at 310°T, 3.5 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 12.0 kn. The current sets 095°T at 1.5 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  

  2. You are at 273°T, 2.7 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 8.2 kn. The current sets 255°T at 1.0 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  

  3. You are at 027°T, 1.9 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 6.5 kn. The current sets 251°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  

  4. You are at 054°T, 3.8 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 9.0 kn. The current sets 031°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 079°T, 2.6 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 11.8 kn. The current sets 144°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  

  6. You are at 022°T, 3.5 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 9.2 kn. The current sets 007°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 242°T, 2.8 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 9.3 kn. The current sets 297°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  

  8. You are at 174°T, 0.9 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 9.0 kn. The current sets 043°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: 172 °T
Speed over the ground: 12.4 kn
Time to the mark: 19 min
No. 388001 (worked solution)
2Course to steer: 180 °T
Speed over the ground: 8.5 kn
Time to the mark: 19 min
No. 388002 (worked solution)
3Course to steer: 112 °T
Speed over the ground: 6.1 kn
Time to the mark: 51 min
No. 388003 (worked solution)
4Course to steer: 146 °T
Speed over the ground: 8.5 kn
Time to the mark: 26 min
No. 388004 (worked solution)
5Course to steer: 349 °T
Speed over the ground: 9.9 kn
Time to the mark: 20 min
No. 388005 (worked solution)
6Course to steer: 139 °T
Speed over the ground: 8.2 kn
Time to the mark: 42 min
No. 388006 (worked solution)
7Course to steer: 197 °T
Speed over the ground: 9.2 kn
Time to the mark: 14 min
No. 388007 (worked solution)
8Course to steer: 263 °T
Speed over the ground: 7.5 kn
Time to the mark: 44 min
No. 388008 (worked solution)