Worksheet 180 · Skill 4
Two-bearing fix
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At 1130 you take two bearings with a hand-bearing compass: Westfield church spire bears 321°M and Gannet Rock daybeacon bears 091°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 Heron Point Light to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Heron Point Light: ________ °T Distance: ________ nm
At 1625 you take two bearings with a hand-bearing compass: Mill stack bears 170°M and Heron Point Light bears 278°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 1225 you take two bearings with a hand-bearing compass: Mill stack bears 157°M and Heron Point Light bears 245°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 1205 you take two bearings with a hand-bearing compass: Heron Point Light bears 250°M and Gannet Rock daybeacon bears 164°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 0845 you take two bearings with a hand-bearing compass: Heron Point Light bears 240°M and Mill stack bears 181°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 0850 you take two bearings with a hand-bearing compass: Heron Point Light bears 216°M and Westfield church spire bears 280°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 1635 you take two bearings with a hand-bearing compass: Heron Point Light bears 222°M and Westfield church spire bears 280°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 1015 you take two bearings with a hand-bearing compass: Heron Point Light bears 247°M and Gannet Rock daybeacon bears 164°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 Heron Point Light: 013 °T Distance: 1.31 nm | No. 180001 (worked solution) |
| 2 | Bearing from Green can "1": 138 °T Distance: 1.95 nm | No. 180002 (worked solution) |
| 3 | Bearing from Red nun "2": 211 °T Distance: 0.93 nm | No. 180003 (worked solution) |
| 4 | Bearing from Tern Island tower: 133 °T Distance: 1.66 nm | No. 180004 (worked solution) |
| 5 | Bearing from Red nun "2": 063 °T Distance: 0.86 nm | No. 180005 (worked solution) |
| 6 | Bearing from Red nun "2": 333 °T Distance: 1.36 nm | No. 180006 (worked solution) |
| 7 | Bearing from Red nun "2": 352 °T Distance: 1.20 nm | No. 180007 (worked solution) |
| 8 | Bearing from Tern Island tower: 126 °T Distance: 1.31 nm | No. 180008 (worked solution) |