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Worksheet 509 · Skill 6

Course to steer

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  1. You are at 069°T, 1.4 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 11.5 kn. The current sets 168°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  

  2. You are at 073°T, 3.0 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 6.8 kn. The current sets 255°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  

  3. You are at 051°T, 4.2 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 10.9 kn. The current sets 240°T at 1.1 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 267°T, 2.4 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 5.3 kn. The current sets 061°T at 1.2 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  

  5. You are at 329°T, 2.9 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 8.6 kn. The current sets 142°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  

  6. You are at 067°T, 2.4 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 8.4 kn. The current sets 065°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  

  7. You are at 055°T, 2.2 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 6.7 kn. The current sets 057°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  

  8. You are at 340°T, 1.3 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 8.1 kn. The current sets 211°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: 067 °T
Speed over the ground: 11.3 kn
Time to the mark: 15 min
No. 509001 (worked solution)
2Course to steer: 108 °T
Speed over the ground: 5.6 kn
Time to the mark: 33 min
No. 509002 (worked solution)
3Course to steer: 169 °T
Speed over the ground: 11.3 kn
Time to the mark: 25 min
No. 509003 (worked solution)
4Course to steer: 266 °T
Speed over the ground: 4.2 kn
Time to the mark: 34 min
No. 509004 (worked solution)
5Course to steer: 194 °T
Speed over the ground: 10.3 kn
Time to the mark: 24 min
No. 509005 (worked solution)
6Course to steer: 147 °T
Speed over the ground: 8.7 kn
Time to the mark: 22 min
No. 509006 (worked solution)
7Course to steer: 003 °T
Speed over the ground: 7.3 kn
Time to the mark: 21 min
No. 509007 (worked solution)
8Course to steer: 265 °T
Speed over the ground: 9.5 kn
Time to the mark: 29 min
No. 509008 (worked solution)