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Worksheet 101 · Skill 6

Course to steer

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  1. You are at 046°T, 2.4 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 9.3 kn. The current sets 164°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  

  2. You are at 051°T, 2.1 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 11.3 kn. The current sets 152°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  

  3. You are at 003°T, 2.4 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 9.0 kn. The current sets 246°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  

  4. You are at 332°T, 1.7 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 10.3 kn. The current sets 310°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 307°T, 1.5 nm from Kittle water tank, bound for Red nun "2". Your speed through the water is 11.0 kn. The current sets 006°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  

  6. You are at 201°T, 2.3 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 8.4 kn. The current sets 221°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  

  7. You are at 300°T, 1.9 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 11.6 kn. The current sets 105°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 217°T, 2.8 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 11.3 kn. The current sets 035°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  

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: 271 °T
Speed over the ground: 8.9 kn
Time to the mark: 45 min
No. 101001 (worked solution)
2Course to steer: 087 °T
Speed over the ground: 11.7 kn
Time to the mark: 12 min
No. 101002 (worked solution)
3Course to steer: 097 °T
Speed over the ground: 7.2 kn
Time to the mark: 34 min
No. 101003 (worked solution)
4Course to steer: 201 °T
Speed over the ground: 9.9 kn
Time to the mark: 28 min
No. 101004 (worked solution)
5Course to steer: 285 °T
Speed over the ground: 11.4 kn
Time to the mark: 29 min
No. 101005 (worked solution)
6Course to steer: 293 °T
Speed over the ground: 8.6 kn
Time to the mark: 34 min
No. 101006 (worked solution)
7Course to steer: 192 °T
Speed over the ground: 11.9 kn
Time to the mark: 13 min
No. 101007 (worked solution)
8Course to steer: 241 °T
Speed over the ground: 9.5 kn
Time to the mark: 13 min
No. 101008 (worked solution)