Worksheet 695 · Skill 3

Dead reckoning

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1. At 0900 you fix your position 134°T, 1.8 nm from Westfield church spire. You steer 133°T at 7.0 kn until 0920, then 045°T at 4.9 kn until 0930.

   Give the 0930 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 0945 you fix your position 292°T, 0.9 nm from Gannet Rock daybeacon. You steer 299°T at 9.2 kn until 0955, then 204°T at 6.0 kn until 1010.

   Give the 1010 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 0835 you fix your position 145°T, 3.3 nm from Westfield church spire. You steer 021°T at 8.8 kn until 0915, then 196°T at 8.1 kn until 0940.

   Give the 0940 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 1140 you fix your position 234°T, 3.2 nm from Tern Island tower. You steer 223°T at 6.9 kn until 1205, then 353°T at 5.0 kn until 1230.

   Give the 1230 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 1250 you fix your position 336°T, 1.5 nm from Kittle water tank. You steer 316°T at 6.0 kn until 1310, then 279°T at 6.2 kn until 1325.

   Give the 1325 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 0845 you fix your position 119°T, 1.9 nm from Westfield church spire. You steer 045°T at 7.4 kn until 0910, then 141°T at 8.5 kn until 0945.

   Give the 0945 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  

7. At 1420 you fix your position 176°T, 1.8 nm from Tern Island tower. You steer 293°T at 9.6 kn until 1430, then 101°T at 5.6 kn until 1500.

   Give the 1500 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  

8. At 0845 you fix your position 341°T, 1.5 nm from Tern Island tower. You steer 279°T at 6.2 kn until 0855, then 218°T at 8.3 kn until 0935.

   Give the 0935 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