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Worksheet 618 · Skill 6

Course to steer

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  1. You are at 059°T, 1.9 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 8.5 kn. The current sets 116°T at 1.6 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  

  2. You are at 077°T, 1.9 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 7.3 kn. The current sets 105°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  

  3. You are at 074°T, 3.6 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 6.0 kn. The current sets 229°T at 1.6 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  

  4. You are at 162°T, 1.1 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 8.8 kn. The current sets 068°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  

  5. You are at 076°T, 2.9 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 10.6 kn. The current sets 122°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 006°T, 3.4 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 8.6 kn. The current sets 345°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  

  7. You are at 288°T, 2.2 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 11.7 kn. The current sets 315°T at 1.6 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  

  8. You are at 128°T, 1.5 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 7.4 kn. The current sets 238°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  

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: 076 °T
Speed over the ground: 9.8 kn
Time to the mark: 15 min
No. 618001 (worked solution)
2Course to steer: 357 °T
Speed over the ground: 7.0 kn
Time to the mark: 29 min
No. 618002 (worked solution)
3Course to steer: 110 °T
Speed over the ground: 5.4 kn
Time to the mark: 29 min
No. 618003 (worked solution)
4Course to steer: 291 °T
Speed over the ground: 8.0 kn
Time to the mark: 32 min
No. 618004 (worked solution)
5Course to steer: 278 °T
Speed over the ground: 8.5 kn
Time to the mark: 44 min
No. 618005 (worked solution)
6Course to steer: 152 °T
Speed over the ground: 6.6 kn
Time to the mark: 58 min
No. 618006 (worked solution)
7Course to steer: 166 °T
Speed over the ground: 10.4 kn
Time to the mark: 13 min
No. 618007 (worked solution)
8Course to steer: 278 °T
Speed over the ground: 8.4 kn
Time to the mark: 47 min
No. 618008 (worked solution)