Worksheet 139 · Skill 6
Course to steer
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You are at 100°T, 1.4 nm from Westfield church spire, bound for Green can "3". Your speed through the water is 5.1 kn. The current sets 148°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
You are at 301°T, 3.6 nm from Tern Island tower, bound for Green can "1". Your speed through the water is 6.1 kn. The current sets 333°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
You are at 128°T, 1.4 nm from Westfield church spire, bound for Red nun "2". Your speed through the water is 11.0 kn. The current sets 339°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
You are at 036°T, 1.9 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 10.2 kn. The current sets 206°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
You are at 019°T, 2.7 nm from Mill stack, bound for Red nun "2". Your speed through the water is 8.5 kn. The current sets 079°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
You are at 053°T, 2.8 nm from Gannet Rock daybeacon, bound for Red nun "2". Your speed through the water is 5.3 kn. The current sets 224°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 078°T, 3.3 nm from Westfield church spire, bound for Green can "1". Your speed through the water is 6.9 kn. The current sets 274°T at 0.5 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 084°T, 1.8 nm from Gannet Rock daybeacon, bound for Green can "3". Your speed through the water is 5.4 kn. The current sets 041°T at 0.6 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
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Course to steer: 074 °T Speed over the ground: 6.0 kn Time to the mark: 42 min | No. 139001 (worked solution) |
| 2 | Course to steer: 182 °T Speed over the ground: 5.4 kn Time to the mark: 55 min | No. 139002 (worked solution) |
| 3 | Course to steer: 107 °T Speed over the ground: 10.1 kn Time to the mark: 19 min | No. 139003 (worked solution) |
| 4 | Course to steer: 263 °T Speed over the ground: 11.2 kn Time to the mark: 33 min | No. 139004 (worked solution) |
| 5 | Course to steer: 290 °T Speed over the ground: 6.9 kn Time to the mark: 21 min | No. 139005 (worked solution) |
| 6 | Course to steer: 265 °T Speed over the ground: 6.5 kn Time to the mark: 67 min | No. 139006 (worked solution) |
| 7 | Course to steer: 166 °T Speed over the ground: 6.8 kn Time to the mark: 24 min | No. 139007 (worked solution) |
| 8 | Course to steer: 272 °T Speed over the ground: 5.0 kn Time to the mark: 63 min | No. 139008 (worked solution) |