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Worksheet 115 · Skill 6

Course to steer

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  1. You are at 226°T, 1.5 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 5.9 kn. The current sets 251°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  

  2. You are at 280°T, 1.8 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 9.6 kn. The current sets 340°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  

  3. You are at 052°T, 0.9 nm from Heron Point Light, bound for Red nun "2". Your speed through the water is 11.6 kn. The current sets 092°T at 1.2 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  

  4. You are at 028°T, 2.2 nm from Mill stack, bound for Green can "1". Your speed through the water is 11.2 kn. The current sets 232°T at 1.2 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  

  5. You are at 355°T, 1.7 nm from Mill stack, bound for Green can "3". Your speed through the water is 9.6 kn. The current sets 315°T at 1.2 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  

  6. You are at 018°T, 3.7 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 7.4 kn. The current sets 264°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  

  7. You are at 031°T, 3.9 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 8.0 kn. The current sets 276°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  

  8. You are at 039°T, 2.8 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 11.5 kn. The current sets 164°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: 327 °T
Speed over the ground: 6.8 kn
Time to the mark: 27 min
No. 115001 (worked solution)
2Course to steer: 195 °T
Speed over the ground: 8.1 kn
Time to the mark: 23 min
No. 115002 (worked solution)
3Course to steer: 045 °T
Speed over the ground: 12.5 kn
Time to the mark: 11 min
No. 115003 (worked solution)
4Course to steer: 298 °T
Speed over the ground: 11.7 kn
Time to the mark: 16 min
No. 115004 (worked solution)
5Course to steer: 010 °T
Speed over the ground: 10.3 kn
Time to the mark: 17 min
No. 115005 (worked solution)
6Course to steer: 150 °T
Speed over the ground: 7.1 kn
Time to the mark: 51 min
No. 115006 (worked solution)
7Course to steer: 129 °T
Speed over the ground: 6.7 kn
Time to the mark: 47 min
No. 115007 (worked solution)
8Course to steer: 267 °T
Speed over the ground: 11.2 kn
Time to the mark: 29 min
No. 115008 (worked solution)