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Worksheet 312 · Skill 6

Course to steer

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  1. You are at 118°T, 2.3 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 11.9 kn. The current sets 125°T at 1.6 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  

  2. You are at 231°T, 1.8 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 5.8 kn. The current sets 316°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 203°T, 2.3 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 7.3 kn. The current sets 045°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  

  4. You are at 047°T, 4.3 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 5.9 kn. The current sets 119°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  

  5. You are at 044°T, 3.0 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 7.3 kn. The current sets 309°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  

  6. You are at 180°T, 1.2 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 9.8 kn. The current sets 359°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  

  7. You are at 023°T, 1.5 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 9.1 kn. The current sets 030°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 092°T, 2.5 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 9.3 kn. The current sets 211°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  

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: 095 °T
Speed over the ground: 13.3 kn
Time to the mark: 10 min
No. 312001 (worked solution)
2Course to steer: 215 °T
Speed over the ground: 5.7 kn
Time to the mark: 22 min
No. 312002 (worked solution)
3Course to steer: 249 °T
Speed over the ground: 5.2 kn
Time to the mark: 25 min
No. 312003 (worked solution)
4Course to steer: 183 °T
Speed over the ground: 7.4 kn
Time to the mark: 37 min
No. 312004 (worked solution)
5Course to steer: 243 °T
Speed over the ground: 8.5 kn
Time to the mark: 40 min
No. 312005 (worked solution)
6Course to steer: 030 °T
Speed over the ground: 11.9 kn
Time to the mark: 27 min
No. 312006 (worked solution)
7Course to steer: 244 °T
Speed over the ground: 7.7 kn
Time to the mark: 49 min
No. 312007 (worked solution)
8Course to steer: 089 °T
Speed over the ground: 8.6 kn
Time to the mark: 22 min
No. 312008 (worked solution)