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Worksheet 129 · Skill 6

Course to steer

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  1. You are at 234°T, 1.4 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 8.7 kn. The current sets 325°T at 2.0 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  

  2. You are at 047°T, 2.6 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 7.3 kn. The current sets 175°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  

  3. You are at 055°T, 3.3 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 8.9 kn. The current sets 153°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 017°T, 1.5 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 5.2 kn. The current sets 274°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  

  5. You are at 022°T, 1.2 nm from Heron Point Light, bound for Green can "3". Your speed through the water is 11.4 kn. The current sets 337°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 142°T, 1.6 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 9.3 kn. The current sets 339°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  

  7. You are at 181°T, 1.2 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 11.8 kn. The current sets 084°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  

  8. You are at 293°T, 2.3 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 11.1 kn. The current sets 076°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  

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: 9.8 kn
Time to the mark: 26 min
No. 129001 (worked solution)
2Course to steer: 277 °T
Speed over the ground: 7.1 kn
Time to the mark: 46 min
No. 129002 (worked solution)
3Course to steer: 276 °T
Speed over the ground: 7.8 kn
Time to the mark: 48 min
No. 129003 (worked solution)
4Course to steer: 131 °T
Speed over the ground: 4.7 kn
Time to the mark: 61 min
No. 129004 (worked solution)
5Course to steer: 071 °T
Speed over the ground: 11.4 kn
Time to the mark: 19 min
No. 129005 (worked solution)
6Course to steer: 290 °T
Speed over the ground: 10.2 kn
Time to the mark: 29 min
No. 129006 (worked solution)
7Course to steer: 014 °T
Speed over the ground: 12.8 kn
Time to the mark: 26 min
No. 129007 (worked solution)
8Course to steer: 181 °T
Speed over the ground: 10.7 kn
Time to the mark: 14 min
No. 129008 (worked solution)