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Worksheet 105 · Skill 6

Course to steer

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  1. You are at 186°T, 1.5 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 5.5 kn. The current sets 298°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  

  2. You are at 051°T, 2.5 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 5.9 kn. The current sets 034°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  

  3. You are at 213°T, 1.8 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.3 kn. The current sets 074°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  

  4. You are at 299°T, 1.5 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 9.8 kn. The current sets 127°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  

  5. You are at 328°T, 2.6 nm from Kittle water tank, bound for Green can "3". Your speed through the water is 9.4 kn. The current sets 071°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  

  6. You are at 068°T, 1.6 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 11.5 kn. The current sets 298°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  

  7. You are at 021°T, 2.7 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 5.8 kn. The current sets 055°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  

  8. You are at 047°T, 2.6 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 8.6 kn. The current sets 028°T at 0.8 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: 031 °T
Speed over the ground: 5.5 kn
Time to the mark: 63 min
No. 105001 (worked solution)
2Course to steer: 248 °T
Speed over the ground: 4.9 kn
Time to the mark: 85 min
No. 105002 (worked solution)
3Course to steer: 271 °T
Speed over the ground: 4.0 kn
Time to the mark: 68 min
No. 105003 (worked solution)
4Course to steer: 220 °T
Speed over the ground: 9.9 kn
Time to the mark: 22 min
No. 105004 (worked solution)
5Course to steer: 291 °T
Speed over the ground: 8.5 kn
Time to the mark: 28 min
No. 105005 (worked solution)
6Course to steer: 016 °T
Speed over the ground: 11.7 kn
Time to the mark: 17 min
No. 105006 (worked solution)
7Course to steer: 125 °T
Speed over the ground: 6.5 kn
Time to the mark: 30 min
No. 105007 (worked solution)
8Course to steer: 108 °T
Speed over the ground: 8.8 kn
Time to the mark: 15 min
No. 105008 (worked solution)