Worksheet 592 · Skill 3

Dead reckoning

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1. At 0910 you fix your position 114°T, 2.0 nm from Gannet Rock daybeacon. You steer 049°T at 6.3 kn until 0925, then 185°T at 7.2 kn until 0935.

   Give the 0935 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  

2. At 0920 you fix your position 013°T, 1.8 nm from Kittle water tank. You steer 280°T at 9.2 kn until 1000, then 337°T at 8.3 kn until 1020.

   Give the 1020 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  

3. At 0845 you fix your position 006°T, 3.1 nm from Mill stack. You steer 342°T at 4.2 kn until 0855, then 204°T at 4.7 kn until 0925.

   Give the 0925 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  

4. At 0955 you fix your position 284°T, 3.3 nm from Tern Island tower. You steer 040°T at 4.0 kn until 1005, then 222°T at 5.9 kn until 1035.

   Give the 1035 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  

5. At 1545 you fix your position 033°T, 3.7 nm from Westfield church spire. You steer 150°T at 6.6 kn until 1615, then 192°T at 5.5 kn until 1640.

   Give the 1640 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 0725 you fix your position 300°T, 2.0 nm from Kittle water tank. You steer 280°T at 9.9 kn until 0750, then 358°T at 5.3 kn until 0825.

   Give the 0825 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  

7. At 0910 you fix your position 263°T, 2.9 nm from Tern Island tower. You steer 337°T at 4.2 kn until 0950, then 106°T at 5.2 kn until 1010.

   Give the 1010 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 0945 you fix your position 043°T, 1.8 nm from Tern Island tower. You steer 153°T at 9.7 kn until 1020, then 037°T at 9.5 kn until 1030.

   Give the 1030 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