Worksheet 240 · Skill 4
Two-bearing fix
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At 0835 you take two bearings with a hand-bearing compass: Westfield church spire bears 280°M and Mill stack bears 208°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 0915 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 123°M and Mill stack bears 173°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 1320 you take two bearings with a hand-bearing compass: Heron Point Light bears 205°M and Gannet Rock daybeacon bears 106°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 0755 you take two bearings with a hand-bearing compass: Heron Point Light bears 234°M and Gannet Rock daybeacon bears 109°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 0945 you take two bearings with a hand-bearing compass: Westfield church spire bears 274°M and Kittle water tank bears 145°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 1420 you take two bearings with a hand-bearing compass: Westfield church spire bears 247°M and Mill stack bears 161°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 1045 you take two bearings with a hand-bearing compass: Heron Point Light bears 183°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 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 0955 you take two bearings with a hand-bearing compass: Mill stack bears 173°M and Heron Point Light bears 237°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
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Bearing from Tern Island tower: 180 °T Distance: 1.48 nm | No. 240001 (worked solution) |
| 2 | Bearing from Green can "3": 314 °T Distance: 2.31 nm | No. 240002 (worked solution) |
| 3 | Bearing from Red nun "2": 305 °T Distance: 1.74 nm | No. 240003 (worked solution) |
| 4 | Bearing from Red nun "2": 038 °T Distance: 1.11 nm | No. 240004 (worked solution) |
| 5 | Bearing from Green can "3": 038 °T Distance: 1.05 nm | No. 240005 (worked solution) |
| 6 | Bearing from Red nun "2": 325 °T Distance: 3.38 nm | No. 240006 (worked solution) |
| 7 | Bearing from Green can "1": 304 °T Distance: 2.40 nm | No. 240007 (worked solution) |
| 8 | Bearing from Green can "1": 046 °T Distance: 1.15 nm | No. 240008 (worked solution) |