Worksheet 758 · Skill 4
Two-bearing fix
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At 1720 you take two bearings with a hand-bearing compass: Mill stack bears 149°M and Westfield church spire bears 212°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 1505 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 161°M and Mill stack bears 221°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 0705 you take two bearings with a hand-bearing compass: Mill stack bears 150°M and Heron Point Light bears 252°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 1355 you take two bearings with a hand-bearing compass: Mill stack bears 163°M and Gannet Rock daybeacon bears 104°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: Mill stack bears 176°M and Gannet Rock daybeacon bears 110°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 1155 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 126°M and Westfield church spire bears 233°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 1300 you take two bearings with a hand-bearing compass: Mill stack bears 156°M and Heron Point Light bears 229°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 1050 you take two bearings with a hand-bearing compass: Mill stack bears 216°M and Gannet Rock daybeacon bears 151°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
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Bearing from Green can "1": 316 °T Distance: 4.49 nm | No. 758001 (worked solution) |
| 2 | Bearing from Tern Island tower: 139 °T Distance: 2.05 nm | No. 758002 (worked solution) |
| 3 | Bearing from Red nun "2": 210 °T Distance: 1.38 nm | No. 758003 (worked solution) |
| 4 | Bearing from Red nun "2": 312 °T Distance: 1.01 nm | No. 758004 (worked solution) |
| 5 | Bearing from Green can "3": 278 °T Distance: 1.03 nm | No. 758005 (worked solution) |
| 6 | Bearing from Red nun "2": 333 °T Distance: 4.17 nm | No. 758006 (worked solution) |
| 7 | Bearing from Red nun "2": 252 °T Distance: 0.90 nm | No. 758007 (worked solution) |
| 8 | Bearing from Tern Island tower: 144 °T Distance: 1.59 nm | No. 758008 (worked solution) |