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Worksheet 31 · Skill 6

Course to steer

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  1. You are at 051°T, 1.9 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 8.2 kn. The current sets 001°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  

  2. You are at 052°T, 2.2 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 9.1 kn. The current sets 051°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  

  3. You are at 083°T, 2.2 nm from Heron Point Light, bound for Green can "3". Your speed through the water is 7.2 kn. The current sets 300°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  

  4. You are at 049°T, 3.6 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 10.5 kn. The current sets 199°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  

  5. You are at 237°T, 2.5 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 6.5 kn. The current sets 245°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  

  6. You are at 071°T, 2.9 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 7.8 kn. The current sets 271°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  

  7. You are at 342°T, 1.3 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 6.1 kn. The current sets 277°T at 0.8 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 001°T, 1.7 nm from Mill stack, bound for Green can "1". Your speed through the water is 5.3 kn. The current sets 197°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: 245 °T
Speed over the ground: 7.5 kn
Time to the mark: 51 min
No. 31001 (worked solution)
2Course to steer: 144 °T
Speed over the ground: 9.1 kn
Time to the mark: 25 min
No. 31002 (worked solution)
3Course to steer: 047 °T
Speed over the ground: 6.9 kn
Time to the mark: 26 min
No. 31003 (worked solution)
4Course to steer: 265 °T
Speed over the ground: 11.3 kn
Time to the mark: 34 min
No. 31004 (worked solution)
5Course to steer: 341 °T
Speed over the ground: 6.5 kn
Time to the mark: 25 min
No. 31005 (worked solution)
6Course to steer: 156 °T
Speed over the ground: 7.5 kn
Time to the mark: 25 min
No. 31006 (worked solution)
7Course to steer: 051 °T
Speed over the ground: 5.6 kn
Time to the mark: 39 min
No. 31007 (worked solution)
8Course to steer: 328 °T
Speed over the ground: 4.3 kn
Time to the mark: 32 min
No. 31008 (worked solution)