Worksheet 77 · Skill 4
Two-bearing fix
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At 1110 you take two bearings with a hand-bearing compass: Heron Point Light bears 248°M and Gannet Rock daybeacon bears 176°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 1705 you take two bearings with a hand-bearing compass: Westfield church spire bears 247°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
At 1435 you take two bearings with a hand-bearing compass: Mill stack bears 159°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 1400 you take two bearings with a hand-bearing compass: Heron Point Light bears 196°M and Westfield church spire bears 296°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 1125 you take two bearings with a hand-bearing compass: Mill stack bears 184°M and Gannet Rock daybeacon bears 126°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 1410 you take two bearings with a hand-bearing compass: Heron Point Light bears 253°M and Gannet Rock daybeacon bears 138°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 0740 you take two bearings with a hand-bearing compass: Westfield church spire bears 298°M and Mill stack bears 195°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 1140 you take two bearings with a hand-bearing compass: Westfield church spire bears 283°M and Mill stack 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 "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
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Bearing from Tern Island tower: 116 °T Distance: 1.61 nm | No. 77001 (worked solution) |
| 2 | Bearing from Red nun "2": 311 °T Distance: 3.57 nm | No. 77002 (worked solution) |
| 3 | Bearing from Red nun "2": 305 °T Distance: 1.52 nm | No. 77003 (worked solution) |
| 4 | Bearing from Green can "1": 311 °T Distance: 1.84 nm | No. 77004 (worked solution) |
| 5 | Bearing from Green can "3": 342 °T Distance: 1.33 nm | No. 77005 (worked solution) |
| 6 | Bearing from Tern Island tower: 153 °T Distance: 1.92 nm | No. 77006 (worked solution) |
| 7 | Bearing from Green can "3": 170 °T Distance: 1.79 nm | No. 77007 (worked solution) |
| 8 | Bearing from Green can "3": 099 °T Distance: 1.51 nm | No. 77008 (worked solution) |