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Worksheet 179 · Skill 6

Course to steer

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  1. You are at 274°T, 3.5 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 9.3 kn. The current sets 263°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  

  2. You are at 000°T, 1.3 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 5.7 kn. The current sets 308°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  

  3. You are at 309°T, 3.1 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 9.8 kn. The current sets 135°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  

  4. You are at 056°T, 3.0 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 11.7 kn. The current sets 315°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  

  5. You are at 049°T, 1.8 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 6.3 kn. The current sets 278°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  

  6. You are at 040°T, 4.7 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 9.5 kn. The current sets 308°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  

  7. You are at 052°T, 3.5 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 9.8 kn. The current sets 345°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  

  8. You are at 005°T, 1.9 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 8.5 kn. The current sets 352°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  

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: 160 °T
Speed over the ground: 9.1 kn
Time to the mark: 18 min
No. 179001 (worked solution)
2Course to steer: 051 °T
Speed over the ground: 5.6 kn
Time to the mark: 36 min
No. 179002 (worked solution)
3Course to steer: 200 °T
Speed over the ground: 10.5 kn
Time to the mark: 30 min
No. 179003 (worked solution)
4Course to steer: 358 °T
Speed over the ground: 13.2 kn
Time to the mark: 10 min
No. 179004 (worked solution)
5Course to steer: 135 °T
Speed over the ground: 5.3 kn
Time to the mark: 45 min
No. 179005 (worked solution)
6Course to steer: 160 °T
Speed over the ground: 8.2 kn
Time to the mark: 38 min
No. 179006 (worked solution)
7Course to steer: 141 °T
Speed over the ground: 7.6 kn
Time to the mark: 31 min
No. 179007 (worked solution)
8Course to steer: 241 °T
Speed over the ground: 8.1 kn
Time to the mark: 39 min
No. 179008 (worked solution)