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Worksheet 90 · Skill 6

Course to steer

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  1. You are at 060°T, 1.6 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 8.7 kn. The current sets 129°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  

  2. You are at 249°T, 1.0 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 5.0 kn. The current sets 178°T at 0.7 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  

  3. You are at 312°T, 3.1 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 6.0 kn. The current sets 213°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  

  4. You are at 237°T, 1.3 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 7.9 kn. The current sets 035°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  

  5. You are at 359°T, 1.9 nm from Mill stack, bound for Red nun "2". Your speed through the water is 9.7 kn. The current sets 352°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 032°T, 4.2 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 9.0 kn. The current sets 285°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  

  7. You are at 335°T, 2.6 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 9.9 kn. The current sets 266°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 155°T, 1.5 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 5.5 kn. The current sets 253°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  

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: 073 °T
Speed over the ground: 9.4 kn
Time to the mark: 17 min
No. 90001 (worked solution)
2Course to steer: 275 °T
Speed over the ground: 5.0 kn
Time to the mark: 54 min
No. 90002 (worked solution)
3Course to steer: 080 °T
Speed over the ground: 4.8 kn
Time to the mark: 79 min
No. 90003 (worked solution)
4Course to steer: 297 °T
Speed over the ground: 7.8 kn
Time to the mark: 22 min
No. 90004 (worked solution)
5Course to steer: 323 °T
Speed over the ground: 11.3 kn
Time to the mark: 11 min
No. 90005 (worked solution)
6Course to steer: 152 °T
Speed over the ground: 7.6 kn
Time to the mark: 46 min
No. 90006 (worked solution)
7Course to steer: 199 °T
Speed over the ground: 10.4 kn
Time to the mark: 35 min
No. 90007 (worked solution)
8Course to steer: 085 °T
Speed over the ground: 3.8 kn
Time to the mark: 59 min
No. 90008 (worked solution)