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Worksheet 166 · Skill 6

Course to steer

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  1. You are at 029°T, 1.8 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 5.1 kn. The current sets 251°T at 2.1 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  

  2. You are at 134°T, 1.6 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 11.7 kn. The current sets 341°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  

  3. You are at 042°T, 4.3 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 5.9 kn. The current sets 150°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  

  4. You are at 321°T, 2.8 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 11.4 kn. The current sets 065°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  

  5. You are at 256°T, 2.4 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 6.7 kn. The current sets 077°T at 1.9 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  

  6. You are at 001°T, 1.9 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 5.5 kn. The current sets 263°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  

  7. You are at 036°T, 1.5 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 7.2 kn. The current sets 125°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 079°T, 2.5 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 9.6 kn. The current sets 212°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  

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: 110 °T
Speed over the ground: 3.7 kn
Time to the mark: 73 min
No. 166001 (worked solution)
2Course to steer: 263 °T
Speed over the ground: 12.5 kn
Time to the mark: 32 min
No. 166002 (worked solution)
3Course to steer: 168 °T
Speed over the ground: 8.0 kn
Time to the mark: 36 min
No. 166003 (worked solution)
4Course to steer: 106 °T
Speed over the ground: 13.4 kn
Time to the mark: 26 min
No. 166004 (worked solution)
5Course to steer: 038 °T
Speed over the ground: 8.3 kn
Time to the mark: 46 min
No. 166005 (worked solution)
6Course to steer: 209 °T
Speed over the ground: 6.1 kn
Time to the mark: 61 min
No. 166006 (worked solution)
7Course to steer: 014 °T
Speed over the ground: 6.8 kn
Time to the mark: 26 min
No. 166007 (worked solution)
8Course to steer: 093 °T
Speed over the ground: 8.7 kn
Time to the mark: 23 min
No. 166008 (worked solution)