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Worksheet 152 · Skill 6

Course to steer

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  1. You are at 323°T, 2.9 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 5.7 kn. The current sets 059°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 274°T, 2.3 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 11.8 kn. The current sets 174°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  

  3. You are at 133°T, 3.0 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 5.3 kn. The current sets 057°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  

  4. You are at 080°T, 3.4 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 11.8 kn. The current sets 051°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  

  5. You are at 278°T, 2.6 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 8.9 kn. The current sets 291°T at 0.7 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 160°T, 1.2 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 10.3 kn. The current sets 310°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 149°T, 1.3 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 7.7 kn. The current sets 083°T at 1.0 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  

  8. You are at 261°T, 2.9 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 10.5 kn. The current sets 114°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: 213 °T
Speed over the ground: 3.8 kn
Time to the mark: 89 min
No. 152001 (worked solution)
2Course to steer: 045 °T
Speed over the ground: 11.0 kn
Time to the mark: 32 min
No. 152002 (worked solution)
3Course to steer: 261 °T
Speed over the ground: 4.6 kn
Time to the mark: 68 min
No. 152003 (worked solution)
4Course to steer: 124 °T
Speed over the ground: 12.5 kn
Time to the mark: 12 min
No. 152004 (worked solution)
5Course to steer: 153 °T
Speed over the ground: 8.4 kn
Time to the mark: 15 min
No. 152005 (worked solution)
6Course to steer: 232 °T
Speed over the ground: 11.0 kn
Time to the mark: 24 min
No. 152006 (worked solution)
7Course to steer: 292 °T
Speed over the ground: 6.8 kn
Time to the mark: 41 min
No. 152007 (worked solution)
8Course to steer: 197 °T
Speed over the ground: 11.1 kn
Time to the mark: 11 min
No. 152008 (worked solution)