Worksheet 646 · Skill 6
Course to steer
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You are at 156°T, 1.7 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 5.9 kn. The current sets 231°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
You are at 314°T, 3.3 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 9.8 kn. The current sets 333°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
You are at 320°T, 3.0 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 5.1 kn. The current sets 174°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
You are at 335°T, 1.7 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 10.6 kn. The current sets 115°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
You are at 177°T, 1.1 nm from Gannet Rock daybeacon, bound for Green can "1". Your speed through the water is 11.0 kn. The current sets 122°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
You are at 300°T, 2.0 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 11.0 kn. The current sets 115°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
You are at 221°T, 1.6 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 6.0 kn. The current sets 073°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
You are at 223°T, 1.7 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 6.8 kn. The current sets 181°T at 1.7 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
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Course to steer: 072 °T Speed over the ground: 4.7 kn Time to the mark: 64 min | No. 646001 (worked solution) |
| 2 | Course to steer: 166 °T Speed over the ground: 7.7 kn Time to the mark: 31 min | No. 646002 (worked solution) |
| 3 | Course to steer: 205 °T Speed over the ground: 6.7 kn Time to the mark: 51 min | No. 646003 (worked solution) |
| 4 | Course to steer: 211 °T Speed over the ground: 10.6 kn Time to the mark: 19 min | No. 646004 (worked solution) |
| 5 | Course to steer: 280 °T Speed over the ground: 9.0 kn Time to the mark: 37 min | No. 646005 (worked solution) |
| 6 | Course to steer: 082 °T Speed over the ground: 12.6 kn Time to the mark: 27 min | No. 646006 (worked solution) |
| 7 | Course to steer: 280 °T Speed over the ground: 4.8 kn Time to the mark: 49 min | No. 646007 (worked solution) |
| 8 | Course to steer: 323 °T Speed over the ground: 5.6 kn Time to the mark: 34 min | No. 646008 (worked solution) |