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Worksheet 483 · Skill 6

Course to steer

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  1. You are at 100°T, 1.8 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 7.3 kn. The current sets 051°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  

  2. You are at 035°T, 1.6 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 10.7 kn. The current sets 344°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  

  3. You are at 306°T, 2.6 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 9.1 kn. The current sets 079°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  

  4. You are at 304°T, 1.9 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 11.8 kn. The current sets 237°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  

  5. You are at 049°T, 2.2 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 10.3 kn. The current sets 025°T at 2.4 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  

  6. You are at 039°T, 1.7 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 8.7 kn. The current sets 178°T at 0.7 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 276°T, 1.7 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 9.3 kn. The current sets 133°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 294°T, 1.5 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 7.7 kn. The current sets 286°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  

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: 359 °T
Speed over the ground: 8.2 kn
Time to the mark: 30 min
No. 483001 (worked solution)
2Course to steer: 244 °T
Speed over the ground: 10.5 kn
Time to the mark: 38 min
No. 483002 (worked solution)
3Course to steer: 187 °T
Speed over the ground: 8.7 kn
Time to the mark: 22 min
No. 483003 (worked solution)
4Course to steer: 178 °T
Speed over the ground: 12.5 kn
Time to the mark: 13 min
No. 483004 (worked solution)
5Course to steer: 130 °T
Speed over the ground: 10.0 kn
Time to the mark: 26 min
No. 483005 (worked solution)
6Course to steer: 269 °T
Speed over the ground: 8.7 kn
Time to the mark: 32 min
No. 483006 (worked solution)
7Course to steer: 221 °T
Speed over the ground: 9.7 kn
Time to the mark: 18 min
No. 483007 (worked solution)
8Course to steer: 252 °T
Speed over the ground: 9.9 kn
Time to the mark: 21 min
No. 483008 (worked solution)