Worksheet 773 · Skill 4
Two-bearing fix
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At 1545 you take two bearings with a hand-bearing compass: Kittle water tank bears 172°M and Mill stack bears 223°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 1345 you take two bearings with a hand-bearing compass: Heron Point Light bears 274°M and Kittle water tank bears 153°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 1610 you take two bearings with a hand-bearing compass: Heron Point Light bears 220°M and Mill stack bears 144°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 1625 you take two bearings with a hand-bearing compass: Mill stack bears 211°M and Westfield church spire bears 290°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 1155 you take two bearings with a hand-bearing compass: Heron Point Light bears 250°M and Kittle water tank bears 151°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 0940 you take two bearings with a hand-bearing compass: Westfield church spire bears 263°M and Mill stack bears 191°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 1215 you take two bearings with a hand-bearing compass: Heron Point Light bears 262°M and Mill stack bears 149°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 1010 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 072°M and Mill stack bears 195°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
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Bearing from Gannet Rock daybeacon: 007 °T Distance: 1.53 nm | No. 773001 (worked solution) |
| 2 | Bearing from Gannet Rock daybeacon: 164 °T Distance: 1.66 nm | No. 773002 (worked solution) |
| 3 | Bearing from Green can "1": 263 °T Distance: 0.98 nm | No. 773003 (worked solution) |
| 4 | Bearing from Green can "3": 128 °T Distance: 1.83 nm | No. 773004 (worked solution) |
| 5 | Bearing from Tern Island tower: 168 °T Distance: 1.61 nm | No. 773005 (worked solution) |
| 6 | Bearing from Tern Island tower: 286 °T Distance: 1.39 nm | No. 773006 (worked solution) |
| 7 | Bearing from Green can "1": 175 °T Distance: 0.90 nm | No. 773007 (worked solution) |
| 8 | Bearing from Red nun "2": 136 °T Distance: 2.15 nm | No. 773008 (worked solution) |