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Worksheet 423 · Skill 6

Course to steer

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  1. You are at 015°T, 2.3 nm from Mill stack, bound for Green can "1". Your speed through the water is 8.7 kn. The current sets 203°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 331°T, 1.8 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 8.5 kn. The current sets 057°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  

  3. You are at 330°T, 2.8 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 6.7 kn. The current sets 162°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  

  4. You are at 018°T, 2.0 nm from Kittle water tank, bound for Red nun "2". Your speed through the water is 9.2 kn. The current sets 061°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  

  5. You are at 306°T, 3.7 nm from Mill stack, bound for Red nun "2". Your speed through the water is 6.8 kn. The current sets 247°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 212°T, 1.3 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 11.1 kn. The current sets 190°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  

  7. You are at 012°T, 1.8 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 11.3 kn. The current sets 111°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  

  8. You are at 135°T, 2.5 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 8.7 kn. The current sets 004°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  

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: 300 °T
Speed over the ground: 8.6 kn
Time to the mark: 18 min
No. 423001 (worked solution)
2Course to steer: 214 °T
Speed over the ground: 7.4 kn
Time to the mark: 44 min
No. 423002 (worked solution)
3Course to steer: 207 °T
Speed over the ground: 8.0 kn
Time to the mark: 39 min
No. 423003 (worked solution)
4Course to steer: 270 °T
Speed over the ground: 7.2 kn
Time to the mark: 58 min
No. 423004 (worked solution)
5Course to steer: 056 °T
Speed over the ground: 4.4 kn
Time to the mark: 32 min
No. 423005 (worked solution)
6Course to steer: 240 °T
Speed over the ground: 11.9 kn
Time to the mark: 18 min
No. 423006 (worked solution)
7Course to steer: 255 °T
Speed over the ground: 10.4 kn
Time to the mark: 32 min
No. 423007 (worked solution)
8Course to steer: 241 °T
Speed over the ground: 7.7 kn
Time to the mark: 43 min
No. 423008 (worked solution)