Worksheet 503 · Skill 4
Two-bearing fix
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At 1630 you take two bearings with a hand-bearing compass: Westfield church spire bears 297°M and Mill stack bears 203°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 1225 you take two bearings with a hand-bearing compass: Mill stack bears 213°M and Gannet Rock daybeacon bears 139°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 1735 you take two bearings with a hand-bearing compass: Kittle water tank bears 195°M and Gannet Rock daybeacon bears 318°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 073°M and Mill stack bears 188°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 0935 you take two bearings with a hand-bearing compass: Kittle water tank bears 159°M and Heron Point Light bears 257°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 1040 you take two bearings with a hand-bearing compass: Heron Point Light bears 262°M and Mill stack bears 200°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 1105 you take two bearings with a hand-bearing compass: Westfield church spire bears 265°M and Mill stack bears 180°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 1215 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 135°M and Heron Point Light bears 249°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 Green can "3": 159 °T Distance: 1.93 nm | No. 503001 (worked solution) |
| 2 | Bearing from Tern Island tower: 158 °T Distance: 1.48 nm | No. 503002 (worked solution) |
| 3 | Bearing from Tern Island tower: 139 °T Distance: 5.20 nm | No. 503003 (worked solution) |
| 4 | Bearing from Red nun "2": 142 °T Distance: 2.01 nm | No. 503004 (worked solution) |
| 5 | Bearing from Tern Island tower: 146 °T Distance: 2.45 nm | No. 503005 (worked solution) |
| 6 | Bearing from Green can "3": 162 °T Distance: 1.85 nm | No. 503006 (worked solution) |
| 7 | Bearing from Green can "3": 331 °T Distance: 1.73 nm | No. 503007 (worked solution) |
| 8 | Bearing from Tern Island tower: 164 °T Distance: 1.47 nm | No. 503008 (worked solution) |