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Worksheet 155 · Skill 6

Course to steer

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  1. You are at 359°T, 1.8 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.0 kn. The current sets 049°T at 2.5 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  

  2. You are at 282°T, 2.9 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 6.5 kn. The current sets 286°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 345°T, 2.3 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 7.6 kn. The current sets 176°T at 1.3 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  

  4. You are at 335°T, 2.7 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 8.9 kn. The current sets 246°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  

  5. You are at 358°T, 1.9 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 9.1 kn. The current sets 055°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  

  6. You are at 067°T, 3.3 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 9.9 kn. The current sets 048°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 019°T, 1.2 nm from Kittle water tank, bound for Green can "1". Your speed through the water is 11.9 kn. The current sets 142°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  

  8. You are at 062°T, 3.6 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 11.8 kn. The current sets 065°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  

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: 239 °T
Speed over the ground: 3.6 kn
Time to the mark: 99 min
No. 155001 (worked solution)
2Course to steer: 174 °T
Speed over the ground: 6.2 kn
Time to the mark: 30 min
No. 155002 (worked solution)
3Course to steer: 092 °T
Speed over the ground: 7.8 kn
Time to the mark: 36 min
No. 155003 (worked solution)
4Course to steer: 099 °T
Speed over the ground: 8.1 kn
Time to the mark: 39 min
No. 155004 (worked solution)
5Course to steer: 218 °T
Speed over the ground: 7.7 kn
Time to the mark: 48 min
No. 155005 (worked solution)
6Course to steer: 164 °T
Speed over the ground: 9.3 kn
Time to the mark: 19 min
No. 155006 (worked solution)
7Course to steer: 285 °T
Speed over the ground: 10.7 kn
Time to the mark: 41 min
No. 155007 (worked solution)
8Course to steer: 182 °T
Speed over the ground: 11.0 kn
Time to the mark: 20 min
No. 155008 (worked solution)