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Worksheet 91 · Skill 6

Course to steer

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  1. You are at 267°T, 3.3 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 5.2 kn. The current sets 198°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  

  2. You are at 183°T, 0.8 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 11.5 kn. The current sets 177°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  

  3. You are at 039°T, 1.4 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 6.7 kn. The current sets 046°T at 0.8 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 190°T, 1.5 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 9.3 kn. The current sets 179°T at 1.5 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  

  5. You are at 042°T, 2.7 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 6.5 kn. The current sets 238°T at 0.9 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 218°T, 1.4 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 7.2 kn. The current sets 047°T at 1.5 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 062°T, 1.4 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 9.8 kn. The current sets 222°T at 1.5 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  

  8. You are at 049°T, 3.9 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 6.7 kn. The current sets 298°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  

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: 113 °T
Speed over the ground: 5.7 kn
Time to the mark: 23 min
No. 91001 (worked solution)
2Course to steer: 276 °T
Speed over the ground: 11.4 kn
Time to the mark: 28 min
No. 91002 (worked solution)
3Course to steer: 115 °T
Speed over the ground: 7.0 kn
Time to the mark: 42 min
No. 91003 (worked solution)
4Course to steer: 297 °T
Speed over the ground: 8.7 kn
Time to the mark: 33 min
No. 91004 (worked solution)
5Course to steer: 136 °T
Speed over the ground: 6.4 kn
Time to the mark: 40 min
No. 91005 (worked solution)
6Course to steer: 295 °T
Speed over the ground: 6.8 kn
Time to the mark: 29 min
No. 91006 (worked solution)
7Course to steer: 021 °T
Speed over the ground: 8.4 kn
Time to the mark: 23 min
No. 91007 (worked solution)
8Course to steer: 136 °T
Speed over the ground: 5.7 kn
Time to the mark: 43 min
No. 91008 (worked solution)