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Worksheet 438 · Skill 6

Course to steer

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  1. You are at 089°T, 1.2 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 8.8 kn. The current sets 130°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  

  2. You are at 115°T, 2.3 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 7.6 kn. The current sets 006°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 103°T, 2.3 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 5.8 kn. The current sets 331°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  

  4. You are at 290°T, 3.2 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 5.5 kn. The current sets 315°T at 1.4 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 098°T, 1.1 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 7.0 kn. The current sets 269°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  

  6. You are at 236°T, 2.5 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 7.8 kn. The current sets 276°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  

  7. You are at 009°T, 1.6 nm from Mill stack, bound for Green can "1". Your speed through the water is 6.2 kn. The current sets 067°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  

  8. You are at 320°T, 1.8 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 6.5 kn. The current sets 320°T at 1.4 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: 111 °T
Speed over the ground: 10.6 kn
Time to the mark: 19 min
No. 438001 (worked solution)
2Course to steer: 115 °T
Speed over the ground: 7.2 kn
Time to the mark: 19 min
No. 438002 (worked solution)
3Course to steer: 008 °T
Speed over the ground: 7.3 kn
Time to the mark: 35 min
No. 438003 (worked solution)
4Course to steer: 170 °T
Speed over the ground: 4.4 kn
Time to the mark: 49 min
No. 438004 (worked solution)
5Course to steer: 036 °T
Speed over the ground: 5.9 kn
Time to the mark: 42 min
No. 438005 (worked solution)
6Course to steer: 044 °T
Speed over the ground: 7.3 kn
Time to the mark: 55 min
No. 438006 (worked solution)
7Course to steer: 292 °T
Speed over the ground: 5.1 kn
Time to the mark: 30 min
No. 438007 (worked solution)
8Course to steer: 194 °T
Speed over the ground: 5.8 kn
Time to the mark: 44 min
No. 438008 (worked solution)