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Worksheet 170 · Skill 6

Course to steer

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  1. You are at 030°T, 2.9 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 6.0 kn. The current sets 015°T at 0.6 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 249°T, 2.1 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 7.9 kn. The current sets 253°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  

  3. You are at 028°T, 0.9 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 5.6 kn. The current sets 131°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  

  4. You are at 047°T, 0.9 nm from Heron Point Light, bound for Red nun "2". Your speed through the water is 5.2 kn. The current sets 347°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 034°T, 2.1 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 10.2 kn. The current sets 333°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  

  6. You are at 126°T, 2.0 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 5.4 kn. The current sets 098°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  

  7. You are at 285°T, 1.5 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 6.9 kn. The current sets 226°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  

  8. You are at 104°T, 2.4 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 10.8 kn. The current sets 126°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: 148 °T
Speed over the ground: 5.6 kn
Time to the mark: 52 min
No. 170001 (worked solution)
2Course to steer: 276 °T
Speed over the ground: 9.4 kn
Time to the mark: 22 min
No. 170002 (worked solution)
3Course to steer: 276 °T
Speed over the ground: 4.3 kn
Time to the mark: 74 min
No. 170003 (worked solution)
4Course to steer: 074 °T
Speed over the ground: 5.8 kn
Time to the mark: 23 min
No. 170004 (worked solution)
5Course to steer: 247 °T
Speed over the ground: 10.6 kn
Time to the mark: 27 min
No. 170005 (worked solution)
6Course to steer: 116 °T
Speed over the ground: 7.2 kn
Time to the mark: 19 min
No. 170006 (worked solution)
7Course to steer: 289 °T
Speed over the ground: 7.2 kn
Time to the mark: 18 min
No. 170007 (worked solution)
8Course to steer: 085 °T
Speed over the ground: 11.7 kn
Time to the mark: 17 min
No. 170008 (worked solution)