Worksheet 904 · Skill 4
Two-bearing fix
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At 1440 you take two bearings with a hand-bearing compass: Mill stack bears 164°M and Heron Point Light bears 260°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 0755 you take two bearings with a hand-bearing compass: Kittle water tank bears 142°M and Gannet Rock daybeacon bears 066°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 1040 you take two bearings with a hand-bearing compass: Kittle water tank bears 183°M and Gannet Rock daybeacon 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 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 0905 you take two bearings with a hand-bearing compass: Heron Point Light bears 219°M and Gannet Rock daybeacon bears 116°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 1710 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 110°M and Heron Point Light bears 190°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 Westfield church spire to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Westfield church spire: ________ °T Distance: ________ nm
At 1215 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 301°M and Kittle water tank bears 227°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 1250 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 118°M and Heron Point Light bears 238°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 1645 you take two bearings with a hand-bearing compass: Westfield church spire bears 300°M and Gannet Rock daybeacon bears 065°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 Mill stack to the fix, and the distance.
Tolerance: 2° and 0.15 nm (or 4 % of the distance).
Bearing from Mill stack: ________ °T Distance: ________ nm
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Bearing from Green can "1": 130 °T Distance: 0.97 nm | No. 904001 (worked solution) |
| 2 | Bearing from Green can "3": 121 °T Distance: 2.92 nm | No. 904002 (worked solution) |
| 3 | Bearing from Bell buoy "HS": 199 °T Distance: 3.29 nm | No. 904003 (worked solution) |
| 4 | Bearing from Green can "3": 299 °T Distance: 1.60 nm | No. 904004 (worked solution) |
| 5 | Bearing from Westfield church spire: 084 °T Distance: 2.10 nm | No. 904005 (worked solution) |
| 6 | Bearing from Bell buoy "HS": 173 °T Distance: 5.11 nm | No. 904006 (worked solution) |
| 7 | Bearing from Tern Island tower: 228 °T Distance: 1.90 nm | No. 904007 (worked solution) |
| 8 | Bearing from Mill stack: 029 °T Distance: 2.56 nm | No. 904008 (worked solution) |