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Worksheet 420 · Skill 6

Course to steer

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  1. You are at 060°T, 2.4 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 7.1 kn. The current sets 206°T at 1.0 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 024°T, 1.7 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 8.7 kn. The current sets 180°T at 0.6 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  

  3. You are at 036°T, 2.2 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 6.3 kn. The current sets 045°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 185°T, 1.9 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.0 kn. The current sets 233°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  

  5. You are at 017°T, 3.1 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 9.4 kn. The current sets 030°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  

  6. You are at 331°T, 2.2 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 10.3 kn. The current sets 016°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  

  7. You are at 049°T, 1.1 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 8.3 kn. The current sets 094°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  

  8. You are at 334°T, 1.0 nm from Kittle water tank, bound for Green can "3". Your speed through the water is 11.1 kn. The current sets 151°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  

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: 147 °T
Speed over the ground: 7.7 kn
Time to the mark: 28 min
No. 420001 (worked solution)
2Course to steer: 090 °T
Speed over the ground: 8.7 kn
Time to the mark: 23 min
No. 420002 (worked solution)
3Course to steer: 251 °T
Speed over the ground: 5.7 kn
Time to the mark: 67 min
No. 420003 (worked solution)
4Course to steer: 290 °T
Speed over the ground: 6.5 kn
Time to the mark: 50 min
No. 420004 (worked solution)
5Course to steer: 133 °T
Speed over the ground: 9.2 kn
Time to the mark: 38 min
No. 420005 (worked solution)
6Course to steer: 102 °T
Speed over the ground: 10.4 kn
Time to the mark: 29 min
No. 420006 (worked solution)
7Course to steer: 262 °T
Speed over the ground: 6.3 kn
Time to the mark: 61 min
No. 420007 (worked solution)
8Course to steer: 310 °T
Speed over the ground: 8.8 kn
Time to the mark: 37 min
No. 420008 (worked solution)