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Worksheet 81 · Skill 6

Course to steer

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  1. You are at 080°T, 3.7 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 9.2 kn. The current sets 164°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 029°T, 1.1 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 11.7 kn. The current sets 260°T at 1.1 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 255°T, 2.2 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 9.6 kn. The current sets 334°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  

  4. You are at 336°T, 1.9 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 6.6 kn. The current sets 120°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 062°T, 2.4 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 10.6 kn. The current sets 178°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  

  6. You are at 019°T, 1.8 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 11.2 kn. The current sets 023°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  

  7. You are at 275°T, 3.5 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 8.0 kn. The current sets 340°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 005°T, 2.7 nm from Mill stack, bound for Bell buoy "HS". Your speed through the water is 9.5 kn. The current sets 141°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  

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: 112 °T
Speed over the ground: 10.5 kn
Time to the mark: 13 min
No. 81001 (worked solution)
2Course to steer: 118 °T
Speed over the ground: 10.9 kn
Time to the mark: 25 min
No. 81002 (worked solution)
3Course to steer: 049 °T
Speed over the ground: 9.8 kn
Time to the mark: 38 min
No. 81003 (worked solution)
4Course to steer: 223 °T
Speed over the ground: 6.4 kn
Time to the mark: 45 min
No. 81004 (worked solution)
5Course to steer: 148 °T
Speed over the ground: 12.6 kn
Time to the mark: 17 min
No. 81005 (worked solution)
6Course to steer: 127 °T
Speed over the ground: 10.9 kn
Time to the mark: 30 min
No. 81006 (worked solution)
7Course to steer: 167 °T
Speed over the ground: 5.6 kn
Time to the mark: 30 min
No. 81007 (worked solution)
8Course to steer: 039 °T
Speed over the ground: 9.3 kn
Time to the mark: 47 min
No. 81008 (worked solution)