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Worksheet 231 · Skill 6

Course to steer

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  1. You are at 052°T, 1.6 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 5.8 kn. The current sets 010°T at 1.0 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  

  2. You are at 032°T, 2.3 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 5.6 kn. The current sets 116°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 204°T, 1.5 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.7 kn. The current sets 233°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  

  4. You are at 196°T, 2.3 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 11.1 kn. The current sets 336°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 247°T, 2.5 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 7.2 kn. The current sets 257°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 075°T, 3.1 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 7.0 kn. The current sets 249°T at 1.5 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 266°T, 1.8 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 9.4 kn. The current sets 335°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  

  8. You are at 140°T, 3.6 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 6.0 kn. The current sets 340°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: 259 °T
Speed over the ground: 5.5 kn
Time to the mark: 52 min
No. 231001 (worked solution)
2Course to steer: 268 °T
Speed over the ground: 3.8 kn
Time to the mark: 100 min
No. 231002 (worked solution)
3Course to steer: 290 °T
Speed over the ground: 7.8 kn
Time to the mark: 37 min
No. 231003 (worked solution)
4Course to steer: 248 °T
Speed over the ground: 11.2 kn
Time to the mark: 17 min
No. 231004 (worked solution)
5Course to steer: 281 °T
Speed over the ground: 8.5 kn
Time to the mark: 22 min
No. 231005 (worked solution)
6Course to steer: 137 °T
Speed over the ground: 6.6 kn
Time to the mark: 23 min
No. 231006 (worked solution)
7Course to steer: 259 °T
Speed over the ground: 9.6 kn
Time to the mark: 23 min
No. 231007 (worked solution)
8Course to steer: 067 °T
Speed over the ground: 6.2 kn
Time to the mark: 23 min
No. 231008 (worked solution)