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Worksheet 253 · Skill 6

Course to steer

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  1. You are at 142°T, 1.6 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 9.5 kn. The current sets 349°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 241°T, 2.3 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 6.0 kn. The current sets 276°T at 2.2 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 153°T, 2.5 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 10.9 kn. The current sets 218°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  

  4. You are at 351°T, 1.7 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 6.0 kn. The current sets 203°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  

  5. You are at 013°T, 1.9 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 6.0 kn. The current sets 113°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 042°T, 4.7 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 9.7 kn. The current sets 174°T at 1.3 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  

  7. You are at 054°T, 2.5 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 8.2 kn. The current sets 055°T at 0.9 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  

  8. You are at 057°T, 2.0 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 8.6 kn. The current sets 000°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  

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: 090 °T
Speed over the ground: 9.3 kn
Time to the mark: 30 min
No. 253001 (worked solution)
2Course to steer: 058 °T
Speed over the ground: 4.5 kn
Time to the mark: 87 min
No. 253002 (worked solution)
3Course to steer: 288 °T
Speed over the ground: 11.3 kn
Time to the mark: 15 min
No. 253003 (worked solution)
4Course to steer: 257 °T
Speed over the ground: 6.7 kn
Time to the mark: 43 min
No. 253004 (worked solution)
5Course to steer: 093 °T
Speed over the ground: 8.2 kn
Time to the mark: 26 min
No. 253005 (worked solution)
6Course to steer: 145 °T
Speed over the ground: 10.9 kn
Time to the mark: 26 min
No. 253006 (worked solution)
7Course to steer: 359 °T
Speed over the ground: 8.7 kn
Time to the mark: 16 min
No. 253007 (worked solution)
8Course to steer: 245 °T
Speed over the ground: 7.9 kn
Time to the mark: 50 min
No. 253008 (worked solution)