Worksheet 397 · Skill 4
Two-bearing fix
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At 1650 you take two bearings with a hand-bearing compass: Mill stack bears 224°M and Westfield church spire bears 298°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 1535 you take two bearings with a hand-bearing compass: Heron Point Light bears 186°M and Gannet Rock daybeacon bears 095°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 0710 you take two bearings with a hand-bearing compass: Heron Point Light bears 250°M and Gannet Rock daybeacon bears 150°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 0920 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 098°M and Mill stack bears 192°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 0825 you take two bearings with a hand-bearing compass: Heron Point Light bears 239°M and Gannet Rock daybeacon bears 117°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 1640 you take two bearings with a hand-bearing compass: Mill stack bears 215°M and Gannet Rock daybeacon bears 153°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 1215 you take two bearings with a hand-bearing compass: Westfield church spire bears 298°M and Heron Point Light bears 207°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 255°M and Mill stack bears 154°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 Gannet Rock daybeacon: 233 °T Distance: 2.31 nm | No. 397001 (worked solution) |
| 2 | Bearing from Green can "1": 281 °T Distance: 1.86 nm | No. 397002 (worked solution) |
| 3 | Bearing from Tern Island tower: 145 °T Distance: 1.57 nm | No. 397003 (worked solution) |
| 4 | Bearing from Green can "3": 165 °T Distance: 0.87 nm | No. 397004 (worked solution) |
| 5 | Bearing from Tern Island tower: 225 °T Distance: 1.92 nm | No. 397005 (worked solution) |
| 6 | Bearing from Tern Island tower: 142 °T Distance: 1.45 nm | No. 397006 (worked solution) |
| 7 | Bearing from Green can "1": 315 °T Distance: 1.34 nm | No. 397007 (worked solution) |
| 8 | Bearing from Red nun "2": 309 °T Distance: 3.32 nm | No. 397008 (worked solution) |