Worksheet 133 · Skill 3

Dead reckoning

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1. At 1500 you fix your position 345°T, 1.1 nm from Kittle water tank. You steer 359°T at 5.3 kn until 1525, then 041°T at 9.3 kn until 1535.

   Give the 1535 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 1240 you fix your position 072°T, 3.2 nm from Tern Island tower. You steer 193°T at 9.2 kn until 1305, then 039°T at 8.3 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  

3. At 0820 you fix your position 123°T, 1.5 nm from Westfield church spire. You steer 025°T at 6.4 kn until 0840, then 095°T at 5.6 kn until 0915.

   Give the 0915 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 1220 you fix your position 106°T, 2.2 nm from Gannet Rock daybeacon. You steer 043°T at 5.5 kn until 1235, then 185°T at 5.2 kn until 1300.

   Give the 1300 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  

5. At 0905 you fix your position 104°T, 2.5 nm from Westfield church spire. You steer 312°T at 7.9 kn until 0915, then 353°T at 6.2 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  

6. At 1405 you fix your position 047°T, 1.5 nm from Kittle water tank. You steer 325°T at 5.5 kn until 1415, then 198°T at 6.3 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  

7. At 1525 you fix your position 090°T, 2.0 nm from Tern Island tower. You steer 065°T at 5.3 kn until 1555, then 281°T at 9.2 kn until 1605.

   Give the 1605 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 0905 you fix your position 144°T, 2.4 nm from Tern Island tower. You steer 188°T at 9.6 kn until 0920, then 270°T at 8.6 kn until 0935.

   Give the 0935 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