Worksheet 299 · Skill 3

Dead reckoning

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1. At 1045 you fix your position 317°T, 1.6 nm from Kittle water tank. You steer 257°T at 8.9 kn until 1055, then 298°T at 8.8 kn until 1125.

   Give the 1125 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 0825 you fix your position 115°T, 1.6 nm from Tern Island tower. You steer 090°T at 6.7 kn until 0840, then 195°T at 6.6 kn until 0910.

   Give the 0910 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  

3. At 0915 you fix your position 219°T, 2.2 nm from Tern Island tower. You steer 297°T at 4.7 kn until 0925, then 264°T at 9.4 kn until 0955.

   Give the 0955 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 1315 you fix your position 012°T, 1.4 nm from Heron Point Light. You steer 043°T at 5.2 kn until 1330, then 228°T at 6.0 kn until 1350.

   Give the 1350 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  

5. At 1545 you fix your position 014°T, 2.4 nm from Heron Point Light. You steer 071°T at 4.1 kn until 1630, then 260°T at 4.8 kn until 1700.

   Give the 1700 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  

6. At 1525 you fix your position 202°T, 1.7 nm from Gannet Rock daybeacon. You steer 322°T at 9.9 kn until 1545, then 262°T at 4.5 kn until 1620.

   Give the 1620 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  

7. At 1530 you fix your position 019°T, 2.3 nm from Heron Point Light. You steer 123°T at 9.8 kn until 1600, then 341°T at 7.0 kn until 1635.

   Give the 1635 DR position as the true bearing FROM Tern Island tower 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 Tern Island tower: ________ °T   Distance: ________ nm  

8. At 0820 you fix your position 093°T, 2.2 nm from Gannet Rock daybeacon. You steer 313°T at 5.0 kn until 0830, then 043°T at 5.7 kn until 0845.

   Give the 0845 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