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Worksheet 79 · Skill 4

Two-bearing fix

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  1. At 0855 you take two bearings with a hand-bearing compass: Westfield church spire bears 261°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  

  2. At 0955 you take two bearings with a hand-bearing compass: Westfield church spire bears 300°M and Mill stack bears 174°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  

  3. At 1640 you take two bearings with a hand-bearing compass: Westfield church spire bears 264°M and Mill stack bears 188°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  

  4. At 1615 you take two bearings with a hand-bearing compass: Mill stack bears 224°M and Heron Point Light bears 274°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  

  5. At 1340 you take two bearings with a hand-bearing compass: Mill stack bears 220°M and Gannet Rock daybeacon bears 112°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  

  6. At 0745 you take two bearings with a hand-bearing compass: Heron Point Light bears 202°M and Gannet Rock daybeacon bears 124°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 1315 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 092°M and Westfield church spire bears 323°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 Heron Point Light to the fix, and the distance.

    Tolerance: 2° and 0.15 nm (or 4 % of the distance).

    Bearing from Heron Point Light: ________ °T   Distance: ________ nm  

  8. At 1300 you take two bearings with a hand-bearing compass: Westfield church spire bears 263°M and Mill stack bears 173°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 Tern Island tower: 302 °T
Distance: 1.28 nm
No. 79001 (worked solution)
2Bearing from Red nun "2": 142 °T
Distance: 0.80 nm
No. 79002 (worked solution)
3Bearing from Tern Island tower: 277 °T
Distance: 1.70 nm
No. 79003 (worked solution)
4Bearing from Gannet Rock daybeacon: 231 °T
Distance: 2.74 nm
No. 79004 (worked solution)
5Bearing from Tern Island tower: 161 °T
Distance: 2.36 nm
No. 79005 (worked solution)
6Bearing from Green can "3": 311 °T
Distance: 3.15 nm
No. 79006 (worked solution)
7Bearing from Heron Point Light: 002 °T
Distance: 1.38 nm
No. 79007 (worked solution)
8Bearing from Green can "3": 313 °T
Distance: 2.20 nm
No. 79008 (worked solution)