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Worksheet 163 · Skill 6

Course to steer

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  1. You are at 174°T, 1.2 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 11.3 kn. The current sets 017°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 051°T, 1.6 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 9.9 kn. The current sets 354°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  

  3. You are at 268°T, 1.6 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 5.2 kn. The current sets 216°T at 2.0 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 318°T, 1.9 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 12.0 kn. The current sets 072°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  

  5. You are at 066°T, 2.6 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 11.8 kn. The current sets 179°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  

  6. You are at 078°T, 2.9 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 9.9 kn. The current sets 085°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  

  7. You are at 358°T, 2.5 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 11.1 kn. The current sets 236°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  

  8. You are at 016°T, 2.6 nm from Mill stack, bound for Bell buoy "HS". Your speed through the water is 11.0 kn. The current sets 119°T at 2.0 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: 236 °T
Speed over the ground: 10.0 kn
Time to the mark: 25 min
No. 163001 (worked solution)
2Course to steer: 096 °T
Speed over the ground: 9.7 kn
Time to the mark: 17 min
No. 163002 (worked solution)
3Course to steer: 319 °T
Speed over the ground: 5.1 kn
Time to the mark: 25 min
No. 163003 (worked solution)
4Course to steer: 095 °T
Speed over the ground: 14.3 kn
Time to the mark: 22 min
No. 163004 (worked solution)
5Course to steer: 278 °T
Speed over the ground: 11.7 kn
Time to the mark: 30 min
No. 163005 (worked solution)
6Course to steer: 168 °T
Speed over the ground: 10.1 kn
Time to the mark: 16 min
No. 163006 (worked solution)
7Course to steer: 098 °T
Speed over the ground: 9.6 kn
Time to the mark: 27 min
No. 163007 (worked solution)
8Course to steer: 035 °T
Speed over the ground: 11.4 kn
Time to the mark: 38 min
No. 163008 (worked solution)