Worksheet 447 · Skill 4
Two-bearing fix
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At 1020 you take two bearings with a hand-bearing compass: Mill stack bears 221°M and Kittle water tank 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 Gannet Rock daybeacon to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Gannet Rock daybeacon: ________ °T Distance: ________ nm
At 0730 you take two bearings with a hand-bearing compass: Mill stack bears 169°M and Westfield church spire bears 287°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 1005 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 119°M and Westfield church spire bears 246°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 1140 you take two bearings with a hand-bearing compass: Westfield church spire bears 243°M and Gannet Rock daybeacon bears 120°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 1650 you take two bearings with a hand-bearing compass: Kittle water tank bears 145°M and Westfield church spire bears 275°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 0830 you take two bearings with a hand-bearing compass: Mill stack bears 188°M and Westfield church spire bears 295°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 1230 you take two bearings with a hand-bearing compass: Heron Point Light bears 268°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 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 1310 you take two bearings with a hand-bearing compass: Mill stack bears 192°M and Gannet Rock daybeacon bears 119°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 Gannet Rock daybeacon: 331 °T Distance: 1.03 nm | No. 447001 (worked solution) |
| 2 | Bearing from Green can "1": 016 °T Distance: 1.34 nm | No. 447002 (worked solution) |
| 3 | Bearing from Red nun "2": 324 °T Distance: 3.43 nm | No. 447003 (worked solution) |
| 4 | Bearing from Red nun "2": 325 °T Distance: 3.57 nm | No. 447004 (worked solution) |
| 5 | Bearing from Green can "3": 046 °T Distance: 1.03 nm | No. 447005 (worked solution) |
| 6 | Bearing from Green can "3": 182 °T Distance: 1.31 nm | No. 447006 (worked solution) |
| 7 | Bearing from Green can "3": 151 °T Distance: 2.43 nm | No. 447007 (worked solution) |
| 8 | Bearing from Tern Island tower: 228 °T Distance: 1.83 nm | No. 447008 (worked solution) |