Worksheet 552 · Skill 3

Dead reckoning

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1. At 1105 you fix your position 117°T, 1.2 nm from Westfield church spire. You steer 139°T at 6.8 kn until 1115, then 085°T at 4.3 kn until 1140.

   Give the 1140 DR position as the true bearing FROM Heron Point Light to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

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

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

2. At 0920 you fix your position 060°T, 3.3 nm from Westfield church spire. You steer 139°T at 5.9 kn until 0955, then 220°T at 4.6 kn until 1010.

   Give the 1010 DR position as the true bearing FROM Heron Point Light to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

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

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

3. At 1310 you fix your position 248°T, 2.2 nm from Tern Island tower. You steer 307°T at 9.3 kn until 1340, then 136°T at 6.9 kn until 1355.

   Give the 1355 DR position as the true bearing FROM Westfield church spire to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

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

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

4. At 0830 you fix your position 207°T, 1.6 nm from Gannet Rock daybeacon. You steer 266°T at 9.8 kn until 0855, then 200°T at 4.1 kn until 0905.

   Give the 0905 DR position as the true bearing FROM Mill stack to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

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

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

5. At 0700 you fix your position 217°T, 2.3 nm from Gannet Rock daybeacon. You steer 267°T at 7.3 kn until 0740, then 335°T at 6.0 kn until 0800.

   Give the 0800 DR position as the true bearing FROM Heron Point Light to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

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

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

6. At 1550 you fix your position 038°T, 1.6 nm from Kittle water tank. You steer 291°T at 8.6 kn until 1620, then 118°T at 5.4 kn until 1700.

   Give the 1700 DR position as the true bearing FROM Kittle water tank to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

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

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

7. At 0915 you fix your position 037°T, 1.6 nm from Heron Point Light. You steer 004°T at 4.2 kn until 0945, then 178°T at 4.1 kn until 1015.

   Give the 1015 DR position as the true bearing FROM Heron Point Light to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

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

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

8. At 1355 you fix your position 092°T, 2.2 nm from Heron Point Light. You steer 037°T at 6.0 kn until 1415, then 084°T at 4.2 kn until 1430.

   Give the 1430 DR position as the true bearing FROM Gannet Rock daybeacon to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

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

   Bearing from Gannet Rock daybeacon: ________ °T   Distance: ________ nm