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Worksheet 102 · Skill 6

Course to steer

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  1. You are at 124°T, 1.7 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.3 kn. The current sets 049°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  

  2. You are at 025°T, 1.9 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 8.7 kn. The current sets 089°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  

  3. You are at 318°T, 1.6 nm from Kittle water tank, bound for Green can "3". Your speed through the water is 10.1 kn. The current sets 029°T at 2.3 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  

  4. You are at 286°T, 2.5 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 8.0 kn. The current sets 319°T at 1.0 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  

  5. You are at 342°T, 1.4 nm from Kittle water tank, bound for Green can "1". Your speed through the water is 6.5 kn. The current sets 064°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  

  6. You are at 061°T, 2.3 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 10.5 kn. The current sets 124°T at 1.4 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 323°T, 1.4 nm from Kittle water tank, bound for Green can "3". Your speed through the water is 10.0 kn. The current sets 347°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  

  8. You are at 281°T, 3.8 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 10.5 kn. The current sets 131°T at 2.3 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  

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: 263 °T
Speed over the ground: 5.0 kn
Time to the mark: 81 min
No. 102001 (worked solution)
2Course to steer: 257 °T
Speed over the ground: 6.6 kn
Time to the mark: 54 min
No. 102002 (worked solution)
3Course to steer: 292 °T
Speed over the ground: 10.1 kn
Time to the mark: 28 min
No. 102003 (worked solution)
4Course to steer: 185 °T
Speed over the ground: 7.3 kn
Time to the mark: 27 min
No. 102004 (worked solution)
5Course to steer: 276 °T
Speed over the ground: 6.0 kn
Time to the mark: 65 min
No. 102005 (worked solution)
6Course to steer: 272 °T
Speed over the ground: 9.3 kn
Time to the mark: 35 min
No. 102006 (worked solution)
7Course to steer: 299 °T
Speed over the ground: 10.9 kn
Time to the mark: 27 min
No. 102007 (worked solution)
8Course to steer: 175 °T
Speed over the ground: 12.3 kn
Time to the mark: 16 min
No. 102008 (worked solution)