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Worksheet 874 · Skill 6

Course to steer

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  1. You are at 011°T, 3.0 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 8.6 kn. The current sets 217°T at 0.7 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  

  2. You are at 119°T, 1.1 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 5.3 kn. The current sets 254°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  

  3. You are at 325°T, 2.7 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 5.8 kn. The current sets 308°T at 0.6 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 254°T, 2.0 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 11.3 kn. The current sets 171°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 008°T, 1.7 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 11.7 kn. The current sets 236°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 293°T, 1.3 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 11.1 kn. The current sets 090°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  

  7. You are at 302°T, 1.0 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 8.0 kn. The current sets 018°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  

  8. You are at 241°T, 2.7 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 8.8 kn. The current sets 014°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  

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: 143 °T
Speed over the ground: 8.8 kn
Time to the mark: 40 min
No. 874001 (worked solution)
2Course to steer: 038 °T
Speed over the ground: 3.7 kn
Time to the mark: 73 min
No. 874002 (worked solution)
3Course to steer: 195 °T
Speed over the ground: 5.6 kn
Time to the mark: 61 min
No. 874003 (worked solution)
4Course to steer: 275 °T
Speed over the ground: 11.1 kn
Time to the mark: 19 min
No. 874004 (worked solution)
5Course to steer: 126 °T
Speed over the ground: 11.1 kn
Time to the mark: 27 min
No. 874005 (worked solution)
6Course to steer: 258 °T
Speed over the ground: 8.9 kn
Time to the mark: 29 min
No. 874006 (worked solution)
7Course to steer: 243 °T
Speed over the ground: 6.7 kn
Time to the mark: 42 min
No. 874007 (worked solution)
8Course to steer: 272 °T
Speed over the ground: 8.6 kn
Time to the mark: 22 min
No. 874008 (worked solution)