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Worksheet 251 · Skill 6

Course to steer

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  1. You are at 277°T, 2.5 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 9.9 kn. The current sets 141°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 071°T, 3.3 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 5.1 kn. The current sets 045°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  

  3. You are at 275°T, 1.7 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.8 kn. The current sets 197°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  

  4. You are at 057°T, 2.7 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 9.1 kn. The current sets 042°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  

  5. You are at 054°T, 2.6 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 9.3 kn. The current sets 171°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  

  6. You are at 227°T, 2.0 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 10.7 kn. The current sets 079°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  

  7. You are at 306°T, 3.8 nm from Mill stack, bound for Red nun "2". Your speed through the water is 10.0 kn. The current sets 247°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  

  8. You are at 163°T, 1.3 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 11.1 kn. The current sets 034°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  

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: 198 °T
Speed over the ground: 10.9 kn
Time to the mark: 16 min
No. 251001 (worked solution)
2Course to steer: 174 °T
Speed over the ground: 4.2 kn
Time to the mark: 39 min
No. 251002 (worked solution)
3Course to steer: 271 °T
Speed over the ground: 7.4 kn
Time to the mark: 31 min
No. 251003 (worked solution)
4Course to steer: 250 °T
Speed over the ground: 7.3 kn
Time to the mark: 59 min
No. 251004 (worked solution)
5Course to steer: 152 °T
Speed over the ground: 11.2 kn
Time to the mark: 21 min
No. 251005 (worked solution)
6Course to steer: 289 °T
Speed over the ground: 9.8 kn
Time to the mark: 22 min
No. 251006 (worked solution)
7Course to steer: 055 °T
Speed over the ground: 7.8 kn
Time to the mark: 18 min
No. 251007 (worked solution)
8Course to steer: 244 °T
Speed over the ground: 9.4 kn
Time to the mark: 23 min
No. 251008 (worked solution)