Worksheet 542 · Skill 3

Dead reckoning

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1. At 1200 you fix your position 230°T, 1.6 nm from Gannet Rock daybeacon. You steer 327°T at 6.9 kn until 1240, then 154°T at 8.8 kn until 1310.

   Give the 1310 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  

2. At 1100 you fix your position 252°T, 2.0 nm from Tern Island tower. You steer 132°T at 4.5 kn until 1140, then 301°T at 4.2 kn until 1150.

   Give the 1150 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 1100 you fix your position 037°T, 3.3 nm from Westfield church spire. You steer 151°T at 5.7 kn until 1110, then 064°T at 6.3 kn until 1145.

   Give the 1145 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 0845 you fix your position 063°T, 3.6 nm from Westfield church spire. You steer 202°T at 5.3 kn until 0930, then 253°T at 4.0 kn until 0940.

   Give the 0940 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 0930 you fix your position 092°T, 1.4 nm from Westfield church spire. You steer 133°T at 6.7 kn until 1005, then 077°T at 8.6 kn until 1025.

   Give the 1025 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 0805 you fix your position 072°T, 3.7 nm from Westfield church spire. You steer 197°T at 4.3 kn until 0825, then 349°T at 5.9 kn until 0855.

   Give the 0855 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  

7. At 0800 you fix your position 056°T, 2.9 nm from Westfield church spire. You steer 352°T at 5.9 kn until 0815, then 195°T at 4.3 kn until 0900.

   Give the 0900 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 1600 you fix your position 250°T, 2.8 nm from Gannet Rock daybeacon. You steer 143°T at 7.4 kn until 1615, then 078°T at 7.4 kn until 1625.

   Give the 1625 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