Worksheet 493 · Skill 4
Two-bearing fix
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At 1655 you take two bearings with a hand-bearing compass: Mill stack bears 190°M and Westfield church spire bears 275°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 0950 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 037°M and Heron Point Light bears 274°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 Kittle water tank to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Kittle water tank: ________ °T Distance: ________ nm
At 1745 you take two bearings with a hand-bearing compass: Heron Point Light bears 192°M and Gannet Rock daybeacon bears 115°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 0750 you take two bearings with a hand-bearing compass: Kittle water tank bears 161°M and Heron Point Light bears 267°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 1730 you take two bearings with a hand-bearing compass: Westfield church spire bears 272°M and Heron Point Light bears 209°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 1330 you take two bearings with a hand-bearing compass: Westfield church spire bears 242°M and Mill stack bears 148°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 1705 you take two bearings with a hand-bearing compass: Mill stack bears 225°M and Kittle water tank bears 172°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 Gannet Rock daybeacon to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Gannet Rock daybeacon: ________ °T Distance: ________ nm
At 1500 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 302°M and Kittle water tank bears 181°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 Tern Island tower: 239 °T Distance: 1.77 nm | No. 493001 (worked solution) |
| 2 | Bearing from Kittle water tank: 299 °T Distance: 2.71 nm | No. 493002 (worked solution) |
| 3 | Bearing from Westfield church spire: 070 °T Distance: 2.41 nm | No. 493003 (worked solution) |
| 4 | Bearing from Tern Island tower: 147 °T Distance: 3.80 nm | No. 493004 (worked solution) |
| 5 | Bearing from Red nun "2": 332 °T Distance: 1.92 nm | No. 493005 (worked solution) |
| 6 | Bearing from Green can "1": 313 °T Distance: 3.85 nm | No. 493006 (worked solution) |
| 7 | Bearing from Gannet Rock daybeacon: 012 °T Distance: 1.27 nm | No. 493007 (worked solution) |
| 8 | Bearing from Tern Island tower: 136 °T Distance: 4.22 nm | No. 493008 (worked solution) |