Worksheet 233 · Skill 4
Two-bearing fix
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At 0910 you take two bearings with a hand-bearing compass: Kittle water tank bears 184°M and Gannet Rock daybeacon bears 314°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 1715 you take two bearings with a hand-bearing compass: Westfield church spire bears 263°M and Mill stack 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 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: Westfield church spire bears 299°M and Heron Point Light bears 218°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 1435 you take two bearings with a hand-bearing compass: Mill stack bears 178°M and Westfield church spire bears 291°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 1540 you take two bearings with a hand-bearing compass: Westfield church spire bears 282°M and Heron Point Light bears 187°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 0735 you take two bearings with a hand-bearing compass: Westfield church spire bears 262°M and Mill stack bears 165°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: Gannet Rock daybeacon bears 115°M and Mill stack bears 214°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 0710 you take two bearings with a hand-bearing compass: Heron Point Light bears 220°M and Mill stack bears 162°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: 138 °T Distance: 4.65 nm | No. 233001 (worked solution) |
| 2 | Bearing from Green can "1": 322 °T Distance: 3.11 nm | No. 233002 (worked solution) |
| 3 | Bearing from Green can "1": 324 °T Distance: 0.89 nm | No. 233003 (worked solution) |
| 4 | Bearing from Green can "3": 225 °T Distance: 1.01 nm | No. 233004 (worked solution) |
| 5 | Bearing from Green can "1": 316 °T Distance: 2.57 nm | No. 233005 (worked solution) |
| 6 | Bearing from Red nun "2": 332 °T Distance: 2.53 nm | No. 233006 (worked solution) |
| 7 | Bearing from Tern Island tower: 171 °T Distance: 2.05 nm | No. 233007 (worked solution) |
| 8 | Bearing from Red nun "2": 304 °T Distance: 0.92 nm | No. 233008 (worked solution) |