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Worksheet 405 · Skill 6

Course to steer

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  1. You are at 150°T, 1.5 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 9.0 kn. The current sets 336°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 246°T, 1.2 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.0 kn. The current sets 001°T at 2.3 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 307°T, 3.2 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 5.7 kn. The current sets 081°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 262°T, 3.0 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 5.8 kn. The current sets 006°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  

  5. You are at 244°T, 1.3 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 9.2 kn. The current sets 018°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  

  6. You are at 347°T, 1.2 nm from Kittle water tank, bound for Red nun "2". Your speed through the water is 11.4 kn. The current sets 327°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 195°T, 1.9 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 11.2 kn. The current sets 198°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 084°T, 1.2 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 11.4 kn. The current sets 344°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: 092 °T
Speed over the ground: 8.4 kn
Time to the mark: 35 min
No. 405001 (worked solution)
2Course to steer: 246 °T
Speed over the ground: 5.4 kn
Time to the mark: 47 min
No. 405002 (worked solution)
3Course to steer: 193 °T
Speed over the ground: 5.5 kn
Time to the mark: 49 min
No. 405003 (worked solution)
4Course to steer: 259 °T
Speed over the ground: 5.6 kn
Time to the mark: 26 min
No. 405004 (worked solution)
5Course to steer: 041 °T
Speed over the ground: 10.6 kn
Time to the mark: 31 min
No. 405005 (worked solution)
6Course to steer: 282 °T
Speed over the ground: 12.5 kn
Time to the mark: 30 min
No. 405006 (worked solution)
7Course to steer: 322 °T
Speed over the ground: 10.2 kn
Time to the mark: 24 min
No. 405007 (worked solution)
8Course to steer: 107 °T
Speed over the ground: 10.4 kn
Time to the mark: 26 min
No. 405008 (worked solution)