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Worksheet 860 · Skill 6

Course to steer

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  1. You are at 288°T, 1.8 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 5.2 kn. The current sets 316°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  

  2. You are at 241°T, 1.5 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 10.0 kn. The current sets 146°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  

  3. You are at 257°T, 2.6 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 10.4 kn. The current sets 148°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  

  4. You are at 243°T, 1.7 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 5.6 kn. The current sets 174°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 315°T, 1.5 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 7.5 kn. The current sets 236°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  

  6. You are at 153°T, 2.7 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 6.0 kn. The current sets 193°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  

  7. You are at 009°T, 2.4 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 6.8 kn. The current sets 059°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  

  8. You are at 265°T, 2.4 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 11.4 kn. The current sets 042°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  

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: 179 °T
Speed over the ground: 3.8 kn
Time to the mark: 52 min
No. 860001 (worked solution)
2Course to steer: 234 °T
Speed over the ground: 10.2 kn
Time to the mark: 14 min
No. 860002 (worked solution)
3Course to steer: 289 °T
Speed over the ground: 9.6 kn
Time to the mark: 15 min
No. 860003 (worked solution)
4Course to steer: 288 °T
Speed over the ground: 5.2 kn
Time to the mark: 45 min
No. 860004 (worked solution)
5Course to steer: 253 °T
Speed over the ground: 9.5 kn
Time to the mark: 29 min
No. 860005 (worked solution)
6Course to steer: 291 °T
Speed over the ground: 6.1 kn
Time to the mark: 41 min
No. 860006 (worked solution)
7Course to steer: 150 °T
Speed over the ground: 6.8 kn
Time to the mark: 48 min
No. 860007 (worked solution)
8Course to steer: 199 °T
Speed over the ground: 9.8 kn
Time to the mark: 15 min
No. 860008 (worked solution)