Worksheet 640 · Skill 4
Two-bearing fix
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At 1510 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 114°M and Mill stack bears 165°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 1520 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 1730 you take two bearings with a hand-bearing compass: Heron Point Light bears 267°M and Kittle water tank bears 169°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 1240 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 093°M and Mill stack bears 177°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 0745 you take two bearings with a hand-bearing compass: Mill stack bears 173°M and Westfield church spire bears 297°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 1245 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 165°M and Heron Point Light bears 247°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 1515 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 128°M and Heron Point Light bears 192°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 0835 you take two bearings with a hand-bearing compass: Mill stack bears 161°M and Westfield church spire bears 267°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 Red nun "2": 330 °T Distance: 2.05 nm | No. 640001 (worked solution) |
| 2 | Bearing from Green can "3": 293 °T Distance: 1.10 nm | No. 640002 (worked solution) |
| 3 | Bearing from Gannet Rock daybeacon: 135 °T Distance: 0.88 nm | No. 640003 (worked solution) |
| 4 | Bearing from Green can "1": 076 °T Distance: 1.24 nm | No. 640004 (worked solution) |
| 5 | Bearing from Green can "1": 072 °T Distance: 1.00 nm | No. 640005 (worked solution) |
| 6 | Bearing from Tern Island tower: 124 °T Distance: 1.33 nm | No. 640006 (worked solution) |
| 7 | Bearing from Westfield church spire: 043 °T Distance: 3.56 nm | No. 640007 (worked solution) |
| 8 | Bearing from Red nun "2": 321 °T Distance: 2.43 nm | No. 640008 (worked solution) |