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Worksheet 516 · Skill 4

Two-bearing fix

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  1. At 1155 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 049°M and Heron Point Light bears 279°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 Mill stack to the fix, and the distance.

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

    Bearing from Mill stack: ________ °T   Distance: ________ nm  

  2. At 1605 you take two bearings with a hand-bearing compass: Westfield church spire bears 265°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 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 1545 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 086°M and Westfield church spire bears 318°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  

  4. At 1210 you take two bearings with a hand-bearing compass: Westfield church spire bears 304°M and Gannet Rock daybeacon bears 052°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 Mill stack to the fix, and the distance.

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

    Bearing from Mill stack: ________ °T   Distance: ________ nm  

  5. At 0925 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 088°M and Westfield church spire bears 327°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  

  6. At 1555 you take two bearings with a hand-bearing compass: Mill stack bears 217°M and Gannet Rock daybeacon bears 135°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  

  7. At 1255 you take two bearings with a hand-bearing compass: Mill stack bears 175°M and Heron Point Light bears 259°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 1545 you take two bearings with a hand-bearing compass: Heron Point Light bears 216°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 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 Mill stack: 047 °T
Distance: 2.23 nm
No. 516001 (worked solution)
2Bearing from Green can "3": 313 °T
Distance: 2.02 nm
No. 516002 (worked solution)
3Bearing from Green can "1": 231 °T
Distance: 0.93 nm
No. 516003 (worked solution)
4Bearing from Mill stack: 043 °T
Distance: 2.13 nm
No. 516004 (worked solution)
5Bearing from Heron Point Light: 013 °T
Distance: 0.92 nm
No. 516005 (worked solution)
6Bearing from Tern Island tower: 155 °T
Distance: 1.89 nm
No. 516006 (worked solution)
7Bearing from Red nun "2": 148 °T
Distance: 1.19 nm
No. 516007 (worked solution)
8Bearing from Green can "3": 313 °T
Distance: 1.88 nm
No. 516008 (worked solution)