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Worksheet 400 · Skill 6

Course to steer

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  1. You are at 273°T, 2.8 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 11.5 kn. The current sets 060°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  

  2. You are at 088°T, 2.5 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 6.4 kn. The current sets 131°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  

  3. You are at 348°T, 1.5 nm from Heron Point Light, bound for Green can "1". Your speed through the water is 9.2 kn. The current sets 149°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  

  4. You are at 225°T, 1.7 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 7.0 kn. The current sets 259°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  

  5. You are at 321°T, 2.4 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 7.5 kn. The current sets 221°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  

  6. You are at 066°T, 1.5 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 8.5 kn. The current sets 184°T at 0.9 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  

  7. You are at 102°T, 1.8 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 10.3 kn. The current sets 018°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  

  8. You are at 292°T, 1.6 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 10.5 kn. The current sets 057°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: 157 °T
Speed over the ground: 11.4 kn
Time to the mark: 11 min
No. 400001 (worked solution)
2Course to steer: 092 °T
Speed over the ground: 8.0 kn
Time to the mark: 24 min
No. 400002 (worked solution)
3Course to steer: 080 °T
Speed over the ground: 10.2 kn
Time to the mark: 12 min
No. 400003 (worked solution)
4Course to steer: 229 °T
Speed over the ground: 7.7 kn
Time to the mark: 24 min
No. 400004 (worked solution)
5Course to steer: 172 °T
Speed over the ground: 9.2 kn
Time to the mark: 23 min
No. 400005 (worked solution)
6Course to steer: 270 °T
Speed over the ground: 8.6 kn
Time to the mark: 43 min
No. 400006 (worked solution)
7Course to steer: 138 °T
Speed over the ground: 9.6 kn
Time to the mark: 16 min
No. 400007 (worked solution)
8Course to steer: 250 °T
Speed over the ground: 8.3 kn
Time to the mark: 30 min
No. 400008 (worked solution)