Worksheet 740 · Skill 4
Two-bearing fix
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At 0730 you take two bearings with a hand-bearing compass: Mill stack bears 187°M and Westfield church spire bears 253°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 1225 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 104°M and Mill stack bears 216°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 1740 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 099°M and Heron Point Light bears 182°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 Westfield church spire to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Westfield church spire: ________ °T Distance: ________ nm
At 1050 you take two bearings with a hand-bearing compass: Westfield church spire bears 302°M and Mill stack bears 194°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 1540 you take two bearings with a hand-bearing compass: Heron Point Light bears 222°M and Mill stack bears 170°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 1640 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 097°M and Heron Point Light bears 203°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 0910 you take two bearings with a hand-bearing compass: Westfield church spire bears 303°M and Gannet Rock daybeacon bears 065°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 Mill stack to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Mill stack: ________ °T Distance: ________ nm
At 1340 you take two bearings with a hand-bearing compass: Mill stack bears 165°M and Gannet Rock daybeacon bears 111°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 Tern Island tower: 307 °T Distance: 2.25 nm | No. 740001 (worked solution) |
| 2 | Bearing from Green can "3": 109 °T Distance: 2.17 nm | No. 740002 (worked solution) |
| 3 | Bearing from Westfield church spire: 124 °T Distance: 2.05 nm | No. 740003 (worked solution) |
| 4 | Bearing from Red nun "2": 131 °T Distance: 1.98 nm | No. 740004 (worked solution) |
| 5 | Bearing from Red nun "2": 346 °T Distance: 1.09 nm | No. 740005 (worked solution) |
| 6 | Bearing from Green can "1": 296 °T Distance: 1.37 nm | No. 740006 (worked solution) |
| 7 | Bearing from Mill stack: 024 °T Distance: 2.17 nm | No. 740007 (worked solution) |
| 8 | Bearing from Red nun "2": 329 °T Distance: 1.66 nm | No. 740008 (worked solution) |