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Worksheet 581 · Skill 4

Two-bearing fix

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  1. At 1450 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 102°M and Mill stack bears 166°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  

  2. At 1655 you take two bearings with a hand-bearing compass: Mill stack bears 206°M and Heron Point Light bears 264°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  

  3. At 0710 you take two bearings with a hand-bearing compass: Mill stack bears 167°M and Heron Point Light bears 234°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  

  4. At 0705 you take two bearings with a hand-bearing compass: Westfield church spire bears 253°M and Mill stack bears 187°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  

  5. At 1600 you take two bearings with a hand-bearing compass: Heron Point Light bears 196°M and Westfield church spire bears 287°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  

  6. At 0715 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 123°M and Mill stack bears 181°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  

  7. At 1410 you take two bearings with a hand-bearing compass: Heron Point Light bears 251°M and Westfield church spire bears 309°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  

  8. At 1320 you take two bearings with a hand-bearing compass: Westfield church spire bears 260°M and Gannet Rock daybeacon bears 131°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

Practice Sheet No. 1 with the starting fixes of this worksheet 34 41 22 38 29 18 27 44 12 21 19 N VAR 7°W (invented) Heron Sound Heron Point Tern Island Westfield Kittle Gannet Rock Fl W 4s 52ft 14M TR TANK SPIRE STACK Dbn 1 2 3 HS 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Border scale: nautical miles (1 nm = 10 ticks) PRACTICE SHEET No. 1 · HERON SOUNDInvented for practice · NOT FOR NAVIGATION · Plotroom

Answer key

No.AnswersProblem
1Bearing from Green can "1": 011 °T
Distance: 1.07 nm
No. 581001 (worked solution)
2Bearing from Green can "3": 155 °T
Distance: 2.03 nm
No. 581002 (worked solution)
3Bearing from Green can "3": 241 °T
Distance: 1.69 nm
No. 581003 (worked solution)
4Bearing from Tern Island tower: 307 °T
Distance: 2.25 nm
No. 581004 (worked solution)
5Bearing from Green can "1": 320 °T
Distance: 2.07 nm
No. 581005 (worked solution)
6Bearing from Green can "3": 329 °T
Distance: 1.35 nm
No. 581006 (worked solution)
7Bearing from Red nun "2": 202 °T
Distance: 1.11 nm
No. 581007 (worked solution)
8Bearing from Green can "3": 339 °T
Distance: 2.12 nm
No. 581008 (worked solution)