Worksheet 31 · Skill 4
Two-bearing fix
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At 0820 you take two bearings with a hand-bearing compass: Mill stack bears 178°M and Gannet Rock daybeacon bears 109°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 0700 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 135°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 1430 you take two bearings with a hand-bearing compass: Westfield church spire bears 245°M and Mill stack bears 176°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 0925 you take two bearings with a hand-bearing compass: Westfield church spire bears 317°M and Heron Point Light 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 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 1045 you take two bearings with a hand-bearing compass: Westfield church spire bears 257°M and Mill stack bears 168°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 1440 you take two bearings with a hand-bearing compass: Mill stack bears 175°M and Westfield church spire bears 269°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 1200 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 076°M and Westfield church spire bears 307°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 0910 you take two bearings with a hand-bearing compass: Mill stack bears 206°M and Gannet Rock daybeacon bears 104°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
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Bearing from Green can "3": 271 °T Distance: 0.83 nm | No. 31001 (worked solution) |
| 2 | Bearing from Tern Island tower: 170 °T Distance: 1.28 nm | No. 31002 (worked solution) |
| 3 | Bearing from Green can "3": 332 °T Distance: 3.40 nm | No. 31003 (worked solution) |
| 4 | Bearing from Green can "1": 181 °T Distance: 1.09 nm | No. 31004 (worked solution) |
| 5 | Bearing from Red nun "2": 340 °T Distance: 2.79 nm | No. 31005 (worked solution) |
| 6 | Bearing from Green can "3": 310 °T Distance: 1.71 nm | No. 31006 (worked solution) |
| 7 | Bearing from Green can "1": 124 °T Distance: 1.68 nm | No. 31007 (worked solution) |
| 8 | Bearing from Green can "3": 116 °T Distance: 1.41 nm | No. 31008 (worked solution) |