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Worksheet 109 · Skill 6

Course to steer

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  1. You are at 328°T, 0.8 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 10.1 kn. The current sets 241°T at 1.9 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  

  2. You are at 251°T, 1.5 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 11.1 kn. The current sets 064°T at 2.4 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  

  3. You are at 080°T, 1.4 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 5.0 kn. The current sets 346°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  

  4. You are at 131°T, 3.0 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 5.0 kn. The current sets 186°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  

  5. You are at 030°T, 2.3 nm from Mill stack, bound for Bell buoy "HS". Your speed through the water is 9.9 kn. The current sets 139°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  

  6. You are at 069°T, 3.7 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 10.1 kn. The current sets 046°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  

  7. You are at 129°T, 1.4 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.3 kn. The current sets 308°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  

  8. You are at 028°T, 2.4 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 10.1 kn. The current sets 175°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  

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: 265 °T
Speed over the ground: 11.9 kn
Time to the mark: 22 min
No. 109001 (worked solution)
2Course to steer: 293 °T
Speed over the ground: 9.7 kn
Time to the mark: 15 min
No. 109002 (worked solution)
3Course to steer: 268 °T
Speed over the ground: 5.3 kn
Time to the mark: 56 min
No. 109003 (worked solution)
4Course to steer: 292 °T
Speed over the ground: 4.8 kn
Time to the mark: 50 min
No. 109004 (worked solution)
5Course to steer: 030 °T
Speed over the ground: 9.5 kn
Time to the mark: 46 min
No. 109005 (worked solution)
6Course to steer: 181 °T
Speed over the ground: 9.3 kn
Time to the mark: 22 min
No. 109006 (worked solution)
7Course to steer: 267 °T
Speed over the ground: 7.2 kn
Time to the mark: 54 min
No. 109007 (worked solution)
8Course to steer: 115 °T
Speed over the ground: 10.7 kn
Time to the mark: 29 min
No. 109008 (worked solution)