Worksheet 509 · Skill 6
Course to steer
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You are at 069°T, 1.4 nm from Tern Island tower, bound for Bell buoy "HS". Your speed through the water is 11.5 kn. The current sets 168°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 073°T, 3.0 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 6.8 kn. The current sets 255°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
You are at 051°T, 4.2 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 10.9 kn. The current sets 240°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
You are at 267°T, 2.4 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 5.3 kn. The current sets 061°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
You are at 329°T, 2.9 nm from Tern Island tower, bound for Green can "3". Your speed through the water is 8.6 kn. The current sets 142°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 067°T, 2.4 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 8.4 kn. The current sets 065°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 055°T, 2.2 nm from Gannet Rock daybeacon, bound for Bell buoy "HS". Your speed through the water is 6.7 kn. The current sets 057°T at 0.9 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 340°T, 1.3 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 8.1 kn. The current sets 211°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
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Course to steer: 067 °T Speed over the ground: 11.3 kn Time to the mark: 15 min | No. 509001 (worked solution) |
| 2 | Course to steer: 108 °T Speed over the ground: 5.6 kn Time to the mark: 33 min | No. 509002 (worked solution) |
| 3 | Course to steer: 169 °T Speed over the ground: 11.3 kn Time to the mark: 25 min | No. 509003 (worked solution) |
| 4 | Course to steer: 266 °T Speed over the ground: 4.2 kn Time to the mark: 34 min | No. 509004 (worked solution) |
| 5 | Course to steer: 194 °T Speed over the ground: 10.3 kn Time to the mark: 24 min | No. 509005 (worked solution) |
| 6 | Course to steer: 147 °T Speed over the ground: 8.7 kn Time to the mark: 22 min | No. 509006 (worked solution) |
| 7 | Course to steer: 003 °T Speed over the ground: 7.3 kn Time to the mark: 21 min | No. 509007 (worked solution) |
| 8 | Course to steer: 265 °T Speed over the ground: 9.5 kn Time to the mark: 29 min | No. 509008 (worked solution) |