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Worksheet 3 · Skill 6

Course to steer

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  1. You are at 298°T, 3.9 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 5.0 kn. The current sets 270°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 044°T, 2.4 nm from Mill stack, bound for Red nun "2". Your speed through the water is 12.0 kn. The current sets 024°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 214°T, 1.5 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 11.5 kn. The current sets 354°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  

  4. You are at 289°T, 1.6 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 7.0 kn. The current sets 211°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  

  5. You are at 293°T, 3.0 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 9.3 kn. The current sets 342°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  

  6. You are at 235°T, 1.4 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.2 kn. The current sets 338°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  

  7. You are at 300°T, 3.5 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 7.9 kn. The current sets 352°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  

  8. You are at 076°T, 2.9 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 8.6 kn. The current sets 116°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: 130 °T
Speed over the ground: 3.6 kn
Time to the mark: 64 min
No. 3001 (worked solution)
2Course to steer: 294 °T
Speed over the ground: 12.2 kn
Time to the mark: 17 min
No. 3002 (worked solution)
3Course to steer: 304 °T
Speed over the ground: 12.5 kn
Time to the mark: 16 min
No. 3003 (worked solution)
4Course to steer: 276 °T
Speed over the ground: 8.3 kn
Time to the mark: 24 min
No. 3004 (worked solution)
5Course to steer: 180 °T
Speed over the ground: 7.8 kn
Time to the mark: 28 min
No. 3005 (worked solution)
6Course to steer: 258 °T
Speed over the ground: 6.7 kn
Time to the mark: 38 min
No. 3006 (worked solution)
7Course to steer: 102 °T
Speed over the ground: 7.6 kn
Time to the mark: 56 min
No. 3007 (worked solution)
8Course to steer: 338 °T
Speed over the ground: 7.2 kn
Time to the mark: 26 min
No. 3008 (worked solution)