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Worksheet 331 · Skill 6

Course to steer

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  1. You are at 270°T, 2.2 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 10.7 kn. The current sets 245°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  

  2. You are at 186°T, 2.0 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 6.7 kn. The current sets 042°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  

  3. You are at 317°T, 2.3 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 10.5 kn. The current sets 138°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  

  4. You are at 053°T, 2.2 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 8.2 kn. The current sets 264°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  

  5. You are at 007°T, 2.2 nm from Mill stack, bound for Red nun "2". Your speed through the water is 5.5 kn. The current sets 264°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  

  6. You are at 318°T, 3.4 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 10.2 kn. The current sets 072°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 040°T, 4.0 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 10.4 kn. The current sets 096°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  

  8. You are at 058°T, 1.6 nm from Kittle water tank, bound for Bell buoy "HS". Your speed through the water is 10.9 kn. The current sets 021°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: 200 °T
Speed over the ground: 11.5 kn
Time to the mark: 18 min
No. 331001 (worked solution)
2Course to steer: 241 °T
Speed over the ground: 4.4 kn
Time to the mark: 48 min
No. 331002 (worked solution)
3Course to steer: 188 °T
Speed over the ground: 11.5 kn
Time to the mark: 17 min
No. 331003 (worked solution)
4Course to steer: 026 °T
Speed over the ground: 7.3 kn
Time to the mark: 21 min
No. 331004 (worked solution)
5Course to steer: 325 °T
Speed over the ground: 6.1 kn
Time to the mark: 21 min
No. 331005 (worked solution)
6Course to steer: 200 °T
Speed over the ground: 8.9 kn
Time to the mark: 34 min
No. 331006 (worked solution)
7Course to steer: 173 °T
Speed over the ground: 10.7 kn
Time to the mark: 29 min
No. 331007 (worked solution)
8Course to steer: 350 °T
Speed over the ground: 12.7 kn
Time to the mark: 28 min
No. 331008 (worked solution)