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Worksheet 150 · Skill 6

Course to steer

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  1. You are at 128°T, 0.9 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 7.5 kn. The current sets 313°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 089°T, 1.8 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 11.5 kn. The current sets 006°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  

  3. You are at 324°T, 1.5 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 11.9 kn. The current sets 141°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 324°T, 2.9 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 9.2 kn. The current sets 069°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  

  5. You are at 245°T, 2.3 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.4 kn. The current sets 267°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 296°T, 1.1 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 8.6 kn. The current sets 092°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  

  7. You are at 009°T, 1.3 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 5.5 kn. The current sets 208°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  

  8. You are at 215°T, 2.3 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.7 kn. The current sets 002°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  

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: 266 °T
Speed over the ground: 9.0 kn
Time to the mark: 37 min
No. 150001 (worked solution)
2Course to steer: 068 °T
Speed over the ground: 12.6 kn
Time to the mark: 12 min
No. 150002 (worked solution)
3Course to steer: 079 °T
Speed over the ground: 13.3 kn
Time to the mark: 22 min
No. 150003 (worked solution)
4Course to steer: 210 °T
Speed over the ground: 7.6 kn
Time to the mark: 45 min
No. 150004 (worked solution)
5Course to steer: 280 °T
Speed over the ground: 8.6 kn
Time to the mark: 23 min
No. 150005 (worked solution)
6Course to steer: 034 °T
Speed over the ground: 9.8 kn
Time to the mark: 28 min
No. 150006 (worked solution)
7Course to steer: 114 °T
Speed over the ground: 5.7 kn
Time to the mark: 51 min
No. 150007 (worked solution)
8Course to steer: 281 °T
Speed over the ground: 6.9 kn
Time to the mark: 37 min
No. 150008 (worked solution)