Worksheet 420 · Skill 4
Two-bearing fix
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At 1615 you take two bearings with a hand-bearing compass: Westfield church spire bears 280°M and Mill stack bears 170°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 0810 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 126°M and Westfield church spire bears 242°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 0725 you take two bearings with a hand-bearing compass: Mill stack bears 217°M and Gannet Rock daybeacon bears 126°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 1320 you take two bearings with a hand-bearing compass: Heron Point Light bears 237°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 "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 0825 you take two bearings with a hand-bearing compass: Westfield church spire bears 266°M and Mill stack bears 171°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 1445 you take two bearings with a hand-bearing compass: Mill stack bears 149°M and Westfield church spire bears 222°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 1510 you take two bearings with a hand-bearing compass: Westfield church spire bears 288°M and Mill stack bears 204°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 1345 you take two bearings with a hand-bearing compass: Kittle water tank bears 201°M and Gannet Rock daybeacon bears 266°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
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Bearing from Red nun "2": 346 °T Distance: 1.23 nm | No. 420001 (worked solution) |
| 2 | Bearing from Green can "3": 313 °T Distance: 3.70 nm | No. 420002 (worked solution) |
| 3 | Bearing from Tern Island tower: 160 °T Distance: 2.01 nm | No. 420003 (worked solution) |
| 4 | Bearing from Green can "1": 044 °T Distance: 0.85 nm | No. 420004 (worked solution) |
| 5 | Bearing from Green can "3": 305 °T Distance: 2.17 nm | No. 420005 (worked solution) |
| 6 | Bearing from Green can "1": 315 °T Distance: 4.25 nm | No. 420006 (worked solution) |
| 7 | Bearing from Green can "3": 127 °T Distance: 1.33 nm | No. 420007 (worked solution) |
| 8 | Bearing from Bell buoy "HS": 179 °T Distance: 3.36 nm | No. 420008 (worked solution) |