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Worksheet 911 · Skill 6

Course to steer

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  1. You are at 052°T, 2.7 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 6.6 kn. The current sets 338°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 073°T, 1.6 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 8.5 kn. The current sets 187°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 125°T, 1.8 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 9.9 kn. The current sets 278°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  

  4. You are at 028°T, 3.2 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 7.0 kn. The current sets 272°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  

  5. You are at 177°T, 1.5 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 7.0 kn. The current sets 220°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  

  6. You are at 277°T, 2.1 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 10.6 kn. The current sets 267°T at 1.3 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  

  7. You are at 041°T, 3.3 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 10.2 kn. The current sets 034°T at 1.2 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 039°T, 2.5 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 11.4 kn. The current sets 045°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  

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: 241 °T
Speed over the ground: 6.6 kn
Time to the mark: 65 min
No. 911001 (worked solution)
2Course to steer: 068 °T
Speed over the ground: 8.2 kn
Time to the mark: 19 min
No. 911002 (worked solution)
3Course to steer: 014 °T
Speed over the ground: 9.9 kn
Time to the mark: 30 min
No. 911003 (worked solution)
4Course to steer: 120 °T
Speed over the ground: 5.4 kn
Time to the mark: 59 min
No. 911004 (worked solution)
5Course to steer: 028 °T
Speed over the ground: 4.8 kn
Time to the mark: 72 min
No. 911005 (worked solution)
6Course to steer: 192 °T
Speed over the ground: 11.0 kn
Time to the mark: 16 min
No. 911006 (worked solution)
7Course to steer: 157 °T
Speed over the ground: 9.6 kn
Time to the mark: 28 min
No. 911007 (worked solution)
8Course to steer: 152 °T
Speed over the ground: 11.0 kn
Time to the mark: 24 min
No. 911008 (worked solution)