Worksheet 719 · Skill 4
Two-bearing fix
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At 1400 you take two bearings with a hand-bearing compass: Heron Point Light bears 213°M and Mill stack bears 155°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 0705 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 133°M and Heron Point Light bears 210°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 0715 you take two bearings with a hand-bearing compass: Westfield church spire bears 317°M and Heron Point Light bears 265°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 1430 you take two bearings with a hand-bearing compass: Westfield church spire bears 269°M and Heron Point Light bears 203°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 1310 you take two bearings with a hand-bearing compass: Westfield church spire bears 255°M and Mill stack bears 193°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 1445 you take two bearings with a hand-bearing compass: Westfield church spire bears 275°M and Mill stack bears 148°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: Heron Point Light bears 248°M and Gannet Rock daybeacon 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 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 1030 you take two bearings with a hand-bearing compass: Westfield church spire bears 247°M and Mill stack bears 163°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 Green can "1": 322 °T Distance: 1.12 nm | No. 719001 (worked solution) |
| 2 | Bearing from Green can "3": 333 °T Distance: 2.96 nm | No. 719002 (worked solution) |
| 3 | Bearing from Green can "1": 185 °T Distance: 1.04 nm | No. 719003 (worked solution) |
| 4 | Bearing from Red nun "2": 324 °T Distance: 2.24 nm | No. 719004 (worked solution) |
| 5 | Bearing from Tern Island tower: 325 °T Distance: 1.76 nm | No. 719005 (worked solution) |
| 6 | Bearing from Green can "1": 311 °T Distance: 3.13 nm | No. 719006 (worked solution) |
| 7 | Bearing from Tern Island tower: 115 °T Distance: 1.63 nm | No. 719007 (worked solution) |
| 8 | Bearing from Red nun "2": 329 °T Distance: 3.36 nm | No. 719008 (worked solution) |