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Worksheet 645 · Skill 6

Course to steer

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  1. You are at 308°T, 1.4 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 5.4 kn. The current sets 321°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  

  2. You are at 354°T, 1.1 nm from Kittle water tank, bound for Green can "3". Your speed through the water is 11.0 kn. The current sets 192°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 262°T, 2.1 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.4 kn. The current sets 036°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  

  4. You are at 040°T, 3.2 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 5.4 kn. The current sets 257°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  

  5. You are at 250°T, 3.0 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 8.8 kn. The current sets 099°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  

  6. You are at 053°T, 3.3 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 10.8 kn. The current sets 284°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  

  7. You are at 217°T, 1.4 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 6.6 kn. The current sets 192°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  

  8. You are at 017°T, 2.1 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 9.3 kn. The current sets 050°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  

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: 194 °T
Speed over the ground: 4.7 kn
Time to the mark: 50 min
No. 645001 (worked solution)
2Course to steer: 310 °T
Speed over the ground: 10.2 kn
Time to the mark: 33 min
No. 645002 (worked solution)
3Course to steer: 259 °T
Speed over the ground: 5.8 kn
Time to the mark: 34 min
No. 645003 (worked solution)
4Course to steer: 124 °T
Speed over the ground: 4.9 kn
Time to the mark: 56 min
No. 645004 (worked solution)
5Course to steer: 205 °T
Speed over the ground: 8.6 kn
Time to the mark: 15 min
No. 645005 (worked solution)
6Course to steer: 126 °T
Speed over the ground: 9.1 kn
Time to the mark: 26 min
No. 645006 (worked solution)
7Course to steer: 302 °T
Speed over the ground: 6.2 kn
Time to the mark: 40 min
No. 645007 (worked solution)
8Course to steer: 136 °T
Speed over the ground: 9.4 kn
Time to the mark: 32 min
No. 645008 (worked solution)