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Worksheet 421 · Skill 6

Course to steer

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  1. You are at 314°T, 1.4 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 6.0 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  

  2. You are at 356°T, 0.9 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 6.8 kn. The current sets 002°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  

  3. You are at 010°T, 2.6 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 7.0 kn. The current sets 088°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 065°T, 2.9 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 5.1 kn. The current sets 291°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 149°T, 1.9 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 9.2 kn. The current sets 188°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  

  6. You are at 087°T, 3.6 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 6.9 kn. The current sets 119°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 277°T, 2.9 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 5.1 kn. The current sets 098°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 042°T, 2.4 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 9.4 kn. The current sets 062°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  

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: 232 °T
Speed over the ground: 6.7 kn
Time to the mark: 44 min
No. 421001 (worked solution)
2Course to steer: 042 °T
Speed over the ground: 7.4 kn
Time to the mark: 30 min
No. 421002 (worked solution)
3Course to steer: 131 °T
Speed over the ground: 8.7 kn
Time to the mark: 41 min
No. 421003 (worked solution)
4Course to steer: 356 °T
Speed over the ground: 5.4 kn
Time to the mark: 29 min
No. 421004 (worked solution)
5Course to steer: 078 °T
Speed over the ground: 8.8 kn
Time to the mark: 23 min
No. 421005 (worked solution)
6Course to steer: 189 °T
Speed over the ground: 7.6 kn
Time to the mark: 17 min
No. 421006 (worked solution)
7Course to steer: 164 °T
Speed over the ground: 6.0 kn
Time to the mark: 23 min
No. 421007 (worked solution)
8Course to steer: 146 °T
Speed over the ground: 9.6 kn
Time to the mark: 26 min
No. 421008 (worked solution)