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Worksheet 181 · Skill 4

Two-bearing fix

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  1. At 1040 you take two bearings with a hand-bearing compass: Heron Point Light bears 194°M and Gannet Rock daybeacon bears 121°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 Westfield church spire to the fix, and the distance.

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

    Bearing from Westfield church spire: ________ °T   Distance: ________ nm  

  2. At 1640 you take two bearings with a hand-bearing compass: Mill stack bears 173°M and Heron Point Light bears 225°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 1550 you take two bearings with a hand-bearing compass: Mill stack bears 154°M and Gannet Rock daybeacon bears 083°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  

  4. At 0950 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 080°M and Mill stack bears 160°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  

  5. At 0750 you take two bearings with a hand-bearing compass: Mill stack bears 188°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 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  

  6. At 1110 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 115°M and Heron Point Light bears 245°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 0800 you take two bearings with a hand-bearing compass: Mill stack bears 153°M and Gannet Rock daybeacon bears 099°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  

  8. At 1500 you take two bearings with a hand-bearing compass: Mill stack bears 199°M and Gannet Rock daybeacon bears 083°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 Westfield church spire: 058 °T
Distance: 2.94 nm
No. 181001 (worked solution)
2Bearing from Red nun "2": 000 °T
Distance: 1.08 nm
No. 181002 (worked solution)
3Bearing from Red nun "2": 196 °T
Distance: 1.34 nm
No. 181003 (worked solution)
4Bearing from Green can "1": 142 °T
Distance: 1.07 nm
No. 181004 (worked solution)
5Bearing from Red nun "2": 072 °T
Distance: 1.34 nm
No. 181005 (worked solution)
6Bearing from Green can "3": 093 °T
Distance: 0.87 nm
No. 181006 (worked solution)
7Bearing from Green can "1": 314 °T
Distance: 1.17 nm
No. 181007 (worked solution)
8Bearing from Green can "3": 162 °T
Distance: 1.72 nm
No. 181008 (worked solution)