Worksheet 830 · Skill 4
Two-bearing fix
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At 1010 you take two bearings with a hand-bearing compass: Heron Point Light bears 223°M and Westfield church spire bears 277°M.
Variation is 7°W (from the rose); a hand-bearing compass held away from the boat's steel is taken to have no deviation. Convert to true, plot the two lines of position, and give the fix as the true bearing FROM Green can "3" to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Green can "3": ________ °T Distance: ________ nm
At 1305 you take two bearings with a hand-bearing compass: Mill stack bears 176°M and Gannet Rock daybeacon bears 116°M.
Variation is 7°W (from the rose); a hand-bearing compass held away from the boat's steel is taken to have no deviation. Convert to true, plot the two lines of position, and give the fix as the true bearing FROM Green can "3" to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Green can "3": ________ °T Distance: ________ nm
At 0935 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 131°M and Heron Point Light bears 247°M.
Variation is 7°W (from the rose); a hand-bearing compass held away from the boat's steel is taken to have no deviation. Convert to true, plot the two lines of position, and give the fix as the true bearing FROM Tern Island tower to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Tern Island tower: ________ °T Distance: ________ nm
At 1500 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 087°M and Mill stack bears 141°M.
Variation is 7°W (from the rose); a hand-bearing compass held away from the boat's steel is taken to have no deviation. Convert to true, plot the two lines of position, and give the fix as the true bearing FROM Green can "1" to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Green can "1": ________ °T Distance: ________ nm
At 1610 you take two bearings with a hand-bearing compass: Mill stack bears 190°M and Westfield church spire bears 306°M.
Variation is 7°W (from the rose); a hand-bearing compass held away from the boat's steel is taken to have no deviation. Convert to true, plot the two lines of position, and give the fix as the true bearing FROM Red nun "2" to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Red nun "2": ________ °T Distance: ________ nm
At 1535 you take two bearings with a hand-bearing compass: Mill stack bears 184°M and Gannet Rock daybeacon bears 074°M.
Variation is 7°W (from the rose); a hand-bearing compass held away from the boat's steel is taken to have no deviation. Convert to true, plot the two lines of position, and give the fix as the true bearing FROM Red nun "2" to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Red nun "2": ________ °T Distance: ________ nm
At 1025 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 088°M and Westfield church spire bears 323°M.
Variation is 7°W (from the rose); a hand-bearing compass held away from the boat's steel is taken to have no deviation. Convert to true, plot the two lines of position, and give the fix as the true bearing FROM Heron Point Light to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Heron Point Light: ________ °T Distance: ________ nm
At 1205 you take two bearings with a hand-bearing compass: Westfield church spire bears 242°M and Mill stack bears 164°M.
Variation is 7°W (from the rose); a hand-bearing compass held away from the boat's steel is taken to have no deviation. Convert to true, plot the two lines of position, and give the fix as the true bearing FROM Red nun "2" to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Red nun "2": ________ °T Distance: ________ nm
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Bearing from Green can "3": 292 °T Distance: 1.33 nm | No. 830001 (worked solution) |
| 2 | Bearing from Green can "3": 302 °T Distance: 1.33 nm | No. 830002 (worked solution) |
| 3 | Bearing from Tern Island tower: 177 °T Distance: 1.34 nm | No. 830003 (worked solution) |
| 4 | Bearing from Green can "1": 240 °T Distance: 1.02 nm | No. 830004 (worked solution) |
| 5 | Bearing from Red nun "2": 143 °T Distance: 2.15 nm | No. 830005 (worked solution) |
| 6 | Bearing from Red nun "2": 145 °T Distance: 1.91 nm | No. 830006 (worked solution) |
| 7 | Bearing from Heron Point Light: 027 °T Distance: 1.05 nm | No. 830007 (worked solution) |
| 8 | Bearing from Red nun "2": 332 °T Distance: 3.64 nm | No. 830008 (worked solution) |