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Worksheet 489 · Skill 4

Two-bearing fix

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  1. At 1345 you take two bearings with a hand-bearing compass: Heron Point Light bears 254°M and Mill stack bears 153°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  

  2. At 0715 you take two bearings with a hand-bearing compass: Mill stack bears 171°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 "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  

  3. At 0950 you take two bearings with a hand-bearing compass: Gannet Rock daybeacon bears 286°M and Kittle water tank bears 184°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 0930 you take two bearings with a hand-bearing compass: Heron Point Light bears 205°M and Westfield church spire bears 263°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  

  5. At 1455 you take two bearings with a hand-bearing compass: Kittle water tank bears 146°M and Mill stack bears 224°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  

  6. At 0850 you take two bearings with a hand-bearing compass: Mill stack bears 221°M and Westfield church spire bears 300°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  

  7. At 1510 you take two bearings with a hand-bearing compass: Heron Point Light bears 264°M and Kittle water tank bears 170°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  

  8. At 1500 you take two bearings with a hand-bearing compass: Kittle water tank bears 149°M and Heron Point Light bears 248°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  

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 Red nun "2": 202 °T
Distance: 1.29 nm
No. 489001 (worked solution)
2Bearing from Green can "1": 115 °T
Distance: 1.16 nm
No. 489002 (worked solution)
3Bearing from Tern Island tower: 131 °T
Distance: 4.07 nm
No. 489003 (worked solution)
4Bearing from Red nun "2": 335 °T
Distance: 2.44 nm
No. 489004 (worked solution)
5Bearing from Gannet Rock daybeacon: 256 °T
Distance: 1.03 nm
No. 489005 (worked solution)
6Bearing from Gannet Rock daybeacon: 234 °T
Distance: 2.65 nm
No. 489006 (worked solution)
7Bearing from Tern Island tower: 139 °T
Distance: 3.59 nm
No. 489007 (worked solution)
8Bearing from Tern Island tower: 178 °T
Distance: 1.48 nm
No. 489008 (worked solution)