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Worksheet 148 · Skill 6

Course to steer

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  1. You are at 205°T, 1.1 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 9.0 kn. The current sets 308°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  

  2. You are at 284°T, 3.1 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 6.8 kn. The current sets 175°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  

  3. You are at 249°T, 3.0 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 11.4 kn. The current sets 158°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  

  4. You are at 329°T, 2.1 nm from Mill stack, bound for Green can "3". Your speed through the water is 5.3 kn. The current sets 353°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  

  5. You are at 016°T, 2.9 nm from Mill stack, bound for Red nun "2". Your speed through the water is 9.0 kn. The current sets 199°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  

  6. You are at 062°T, 2.8 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 6.5 kn. The current sets 242°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  

  7. You are at 066°T, 1.9 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 11.3 kn. The current sets 308°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 285°T, 4.0 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 9.3 kn. The current sets 228°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  

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: 279 °T
Speed over the ground: 10.2 kn
Time to the mark: 26 min
No. 148001 (worked solution)
2Course to steer: 193 °T
Speed over the ground: 8.6 kn
Time to the mark: 27 min
No. 148002 (worked solution)
3Course to steer: 209 °T
Speed over the ground: 12.8 kn
Time to the mark: 10 min
No. 148003 (worked solution)
4Course to steer: 032 °T
Speed over the ground: 6.7 kn
Time to the mark: 27 min
No. 148004 (worked solution)
5Course to steer: 305 °T
Speed over the ground: 8.7 kn
Time to the mark: 15 min
No. 148005 (worked solution)
6Course to steer: 006 °T
Speed over the ground: 5.8 kn
Time to the mark: 26 min
No. 148006 (worked solution)
7Course to steer: 259 °T
Speed over the ground: 12.1 kn
Time to the mark: 33 min
No. 148007 (worked solution)
8Course to steer: 171 °T
Speed over the ground: 10.0 kn
Time to the mark: 25 min
No. 148008 (worked solution)