Worksheet 621 · Skill 4
Two-bearing fix
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At 1510 you take two bearings with a hand-bearing compass: Westfield church spire bears 253°M and Mill stack bears 189°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 0735 you take two bearings with a hand-bearing compass: Westfield church spire bears 319°M and Gannet Rock daybeacon bears 080°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 1650 you take two bearings with a hand-bearing compass: Westfield church spire bears 292°M and Mill stack bears 213°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 1200 you take two bearings with a hand-bearing compass: Westfield church spire bears 278°M and Heron Point Light bears 226°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 1000 you take two bearings with a hand-bearing compass: Kittle water tank bears 186°M and Gannet Rock daybeacon bears 253°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 Bell buoy "HS" to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Bell buoy "HS": ________ °T Distance: ________ nm
At 0755 you take two bearings with a hand-bearing compass: Westfield church spire bears 255°M and Mill stack bears 176°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 0850 you take two bearings with a hand-bearing compass: Westfield church spire bears 275°M and Mill stack bears 179°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 0845 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 074°M and Westfield church spire bears 307°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: 314 °T Distance: 2.12 nm | No. 621001 (worked solution) |
| 2 | Bearing from Green can "1": 192 °T Distance: 1.15 nm | No. 621002 (worked solution) |
| 3 | Bearing from Green can "3": 134 °T Distance: 2.02 nm | No. 621003 (worked solution) |
| 4 | Bearing from Green can "3": 293 °T Distance: 1.10 nm | No. 621004 (worked solution) |
| 5 | Bearing from Bell buoy "HS": 195 °T Distance: 3.32 nm | No. 621005 (worked solution) |
| 6 | Bearing from Green can "3": 327 °T Distance: 2.61 nm | No. 621006 (worked solution) |
| 7 | Bearing from Green can "3": 308 °T Distance: 1.07 nm | No. 621007 (worked solution) |
| 8 | Bearing from Green can "1": 124 °T Distance: 1.87 nm | No. 621008 (worked solution) |