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Worksheet 186 · Skill 6

Course to steer

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  1. You are at 089°T, 3.5 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 7.1 kn. The current sets 318°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 032°T, 1.3 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 8.7 kn. The current sets 194°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 335°T, 1.9 nm from Heron Point Light, bound for Green can "1". Your speed through the water is 8.7 kn. The current sets 169°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 223°T, 2.3 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 5.6 kn. The current sets 001°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  

  5. You are at 067°T, 3.4 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 10.3 kn. The current sets 130°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  

  6. You are at 028°T, 1.9 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 6.0 kn. The current sets 268°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  

  7. You are at 064°T, 2.1 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 5.1 kn. The current sets 126°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  

  8. You are at 308°T, 3.9 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 11.7 kn. The current sets 193°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: 165 °T
Speed over the ground: 5.4 kn
Time to the mark: 23 min
No. 186001 (worked solution)
2Course to steer: 091 °T
Speed over the ground: 8.5 kn
Time to the mark: 36 min
No. 186002 (worked solution)
3Course to steer: 084 °T
Speed over the ground: 9.1 kn
Time to the mark: 17 min
No. 186003 (worked solution)
4Course to steer: 309 °T
Speed over the ground: 7.2 kn
Time to the mark: 27 min
No. 186004 (worked solution)
5Course to steer: 175 °T
Speed over the ground: 11.3 kn
Time to the mark: 18 min
No. 186005 (worked solution)
6Course to steer: 094 °T
Speed over the ground: 3.8 kn
Time to the mark: 49 min
No. 186006 (worked solution)
7Course to steer: 344 °T
Speed over the ground: 3.6 kn
Time to the mark: 48 min
No. 186007 (worked solution)
8Course to steer: 089 °T
Speed over the ground: 11.4 kn
Time to the mark: 38 min
No. 186008 (worked solution)