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Worksheet 507 · Skill 6

Course to steer

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  1. You are at 276°T, 3.3 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 11.5 kn. The current sets 213°T at 1.8 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  

  2. You are at 290°T, 3.8 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 5.1 kn. The current sets 255°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  

  3. You are at 016°T, 3.3 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 7.7 kn. The current sets 265°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  

  4. You are at 137°T, 1.3 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 5.0 kn. The current sets 000°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  

  5. You are at 347°T, 1.6 nm from Mill stack, bound for Green can "1". Your speed through the water is 10.3 kn. The current sets 026°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 286°T, 3.1 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 8.3 kn. The current sets 010°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  

  7. You are at 092°T, 2.1 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 7.3 kn. The current sets 256°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  

  8. You are at 033°T, 1.0 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 5.0 kn. The current sets 064°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  

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: 132 °T
Speed over the ground: 11.9 kn
Time to the mark: 13 min
No. 507001 (worked solution)
2Course to steer: 145 °T
Speed over the ground: 4.8 kn
Time to the mark: 48 min
No. 507002 (worked solution)
3Course to steer: 138 °T
Speed over the ground: 6.7 kn
Time to the mark: 53 min
No. 507003 (worked solution)
4Course to steer: 268 °T
Speed over the ground: 5.1 kn
Time to the mark: 68 min
No. 507004 (worked solution)
5Course to steer: 304 °T
Speed over the ground: 10.9 kn
Time to the mark: 12 min
No. 507005 (worked solution)
6Course to steer: 158 °T
Speed over the ground: 7.1 kn
Time to the mark: 23 min
No. 507006 (worked solution)
7Course to steer: 136 °T
Speed over the ground: 7.0 kn
Time to the mark: 21 min
No. 507007 (worked solution)
8Course to steer: 026 °T
Speed over the ground: 5.4 kn
Time to the mark: 38 min
No. 507008 (worked solution)