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Worksheet 172 · Skill 4

Two-bearing fix

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  1. At 1500 you take two bearings with a hand-bearing compass: Heron Point Light bears 172°M and Gannet Rock daybeacon bears 101°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 0830 you take two bearings with a hand-bearing compass: Westfield church spire bears 264°M and Kittle water tank bears 144°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 1610 you take two bearings with a hand-bearing compass: Mill stack bears 217°M and Gannet Rock daybeacon bears 089°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 1515 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 005°M and Heron Point Light bears 272°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 Kittle water tank to the fix, and the distance.

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

    Bearing from Kittle water tank: ________ °T   Distance: ________ nm  

  5. At 1425 you take two bearings with a hand-bearing compass: Heron Point Light bears 210°M and Gannet Rock daybeacon bears 107°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 0755 you take two bearings with a hand-bearing compass: Mill stack bears 186°M and Westfield church spire 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  

  7. At 1320 you take two bearings with a hand-bearing compass: Mill stack bears 193°M and Gannet Rock daybeacon bears 094°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  

  8. At 1530 you take two bearings with a hand-bearing compass: Westfield church spire bears 277°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  

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: 125 °T
Distance: 1.48 nm
No. 172001 (worked solution)
2Bearing from Green can "3": 349 °T
Distance: 1.75 nm
No. 172002 (worked solution)
3Bearing from Green can "3": 121 °T
Distance: 2.21 nm
No. 172003 (worked solution)
4Bearing from Kittle water tank: 320 °T
Distance: 2.12 nm
No. 172004 (worked solution)
5Bearing from Red nun "2": 313 °T
Distance: 1.52 nm
No. 172005 (worked solution)
6Bearing from Green can "3": 353 °T
Distance: 1.76 nm
No. 172006 (worked solution)
7Bearing from Green can "3": 166 °T
Distance: 1.10 nm
No. 172007 (worked solution)
8Bearing from Green can "1": 311 °T
Distance: 3.07 nm
No. 172008 (worked solution)