Worksheet 349 · Skill 3

Dead reckoning

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1. At 0735 you fix your position 350°T, 1.7 nm from Heron Point Light. You steer 049°T at 6.6 kn until 0755, then 165°T at 6.0 kn until 0820.

   Give the 0820 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 1130 you fix your position 263°T, 2.3 nm from Gannet Rock daybeacon. You steer 272°T at 9.1 kn until 1145, then 071°T at 6.7 kn until 1230.

   Give the 1230 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 1345 you fix your position 025°T, 2.3 nm from Kittle water tank. You steer 260°T at 5.9 kn until 1410, then 301°T at 8.1 kn until 1455.

   Give the 1455 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  

4. At 1050 you fix your position 301°T, 3.1 nm from Tern Island tower. You steer 190°T at 5.2 kn until 1120, then 223°T at 4.7 kn until 1155.

   Give the 1155 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 0800 you fix your position 250°T, 2.1 nm from Gannet Rock daybeacon. You steer 005°T at 4.9 kn until 0810, then 059°T at 9.1 kn until 0835.

   Give the 0835 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  

6. At 0905 you fix your position 023°T, 2.2 nm from Mill stack. You steer 267°T at 6.3 kn until 0935, then 023°T at 5.8 kn until 0955.

   Give the 0955 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 0905 you fix your position 034°T, 1.6 nm from Westfield church spire. You steer 113°T at 5.8 kn until 0915, then 032°T at 4.0 kn until 0935.

   Give the 0935 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  

8. At 1310 you fix your position 269°T, 1.0 nm from Gannet Rock daybeacon. You steer 259°T at 9.1 kn until 1345, then 097°T at 9.7 kn until 1425.

   Give the 1425 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