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Worksheet 100 · Skill 6

Course to steer

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  1. You are at 318°T, 2.6 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 11.0 kn. The current sets 117°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  

  2. You are at 045°T, 3.2 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 10.2 kn. The current sets 152°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  

  3. You are at 061°T, 1.6 nm from Kittle water tank, bound for Green can "3". Your speed through the water is 8.1 kn. The current sets 274°T at 1.3 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  

  4. You are at 233°T, 2.4 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 5.9 kn. The current sets 051°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  

  5. You are at 263°T, 3.4 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 9.3 kn. The current sets 180°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  

  6. You are at 117°T, 1.6 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 7.8 kn. The current sets 139°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  

  7. You are at 344°T, 1.6 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 10.0 kn. The current sets 311°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 024°T, 1.7 nm from Mill stack, bound for Green can "1". Your speed through the water is 8.9 kn. The current sets 347°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  

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: 183 °T
Speed over the ground: 11.3 kn
Time to the mark: 19 min
No. 100001 (worked solution)
2Course to steer: 257 °T
Speed over the ground: 10.0 kn
Time to the mark: 44 min
No. 100002 (worked solution)
3Course to steer: 300 °T
Speed over the ground: 9.3 kn
Time to the mark: 45 min
No. 100003 (worked solution)
4Course to steer: 311 °T
Speed over the ground: 5.8 kn
Time to the mark: 29 min
No. 100004 (worked solution)
5Course to steer: 115 °T
Speed over the ground: 10.3 kn
Time to the mark: 12 min
No. 100005 (worked solution)
6Course to steer: 287 °T
Speed over the ground: 6.2 kn
Time to the mark: 61 min
No. 100006 (worked solution)
7Course to steer: 240 °T
Speed over the ground: 10.9 kn
Time to the mark: 26 min
No. 100007 (worked solution)
8Course to steer: 297 °T
Speed over the ground: 9.6 kn
Time to the mark: 18 min
No. 100008 (worked solution)