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Worksheet 891 · Skill 6

Course to steer

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  1. You are at 226°T, 1.4 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 6.6 kn. The current sets 260°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  

  2. You are at 215°T, 1.7 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 9.9 kn. The current sets 197°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  

  3. You are at 228°T, 1.6 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 10.4 kn. The current sets 003°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  

  4. You are at 061°T, 1.6 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 7.7 kn. The current sets 155°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 204°T, 1.8 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 8.1 kn. The current sets 314°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  

  6. You are at 198°T, 1.8 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 9.8 kn. The current sets 339°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  

  7. You are at 009°T, 1.9 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 5.1 kn. The current sets 237°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  

  8. You are at 322°T, 0.8 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 9.3 kn. The current sets 082°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: 280 °T
Speed over the ground: 8.7 kn
Time to the mark: 30 min
No. 891001 (worked solution)
2Course to steer: 316 °T
Speed over the ground: 9.5 kn
Time to the mark: 21 min
No. 891002 (worked solution)
3Course to steer: 227 °T
Speed over the ground: 9.6 kn
Time to the mark: 14 min
No. 891003 (worked solution)
4Course to steer: 068 °T
Speed over the ground: 7.9 kn
Time to the mark: 20 min
No. 891004 (worked solution)
5Course to steer: 289 °T
Speed over the ground: 9.3 kn
Time to the mark: 28 min
No. 891005 (worked solution)
6Course to steer: 284 °T
Speed over the ground: 10.9 kn
Time to the mark: 25 min
No. 891006 (worked solution)
7Course to steer: 260 °T
Speed over the ground: 6.1 kn
Time to the mark: 38 min
No. 891007 (worked solution)
8Course to steer: 030 °T
Speed over the ground: 11.0 kn
Time to the mark: 23 min
No. 891008 (worked solution)