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Worksheet 87 · Skill 6

Course to steer

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  1. You are at 283°T, 1.7 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 9.8 kn. The current sets 105°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 010°T, 3.6 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 10.3 kn. The current sets 232°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  

  3. You are at 348°T, 2.3 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 5.0 kn. The current sets 304°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  

  4. You are at 326°T, 1.8 nm from Tern Island tower, bound for Red nun "2". Your speed through the water is 8.2 kn. The current sets 052°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  

  5. You are at 002°T, 1.4 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 10.7 kn. The current sets 080°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 327°T, 2.2 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 12.0 kn. The current sets 147°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  

  7. You are at 098°T, 2.8 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 8.3 kn. The current sets 297°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  

  8. You are at 009°T, 2.7 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 9.2 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  

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: 267 °T
Speed over the ground: 8.3 kn
Time to the mark: 23 min
No. 87001 (worked solution)
2Course to steer: 125 °T
Speed over the ground: 10.1 kn
Time to the mark: 38 min
No. 87002 (worked solution)
3Course to steer: 199 °T
Speed over the ground: 4.8 kn
Time to the mark: 77 min
No. 87003 (worked solution)
4Course to steer: 210 °T
Speed over the ground: 7.2 kn
Time to the mark: 37 min
No. 87004 (worked solution)
5Course to steer: 143 °T
Speed over the ground: 11.9 kn
Time to the mark: 25 min
No. 87005 (worked solution)
6Course to steer: 212 °T
Speed over the ground: 12.7 kn
Time to the mark: 26 min
No. 87006 (worked solution)
7Course to steer: 004 °T
Speed over the ground: 9.3 kn
Time to the mark: 27 min
No. 87007 (worked solution)
8Course to steer: 125 °T
Speed over the ground: 10.0 kn
Time to the mark: 37 min
No. 87008 (worked solution)