Worksheet 769 · Skill 3

Dead reckoning

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1. At 0820 you fix your position 012°T, 0.8 nm from Kittle water tank. You steer 355°T at 6.9 kn until 0840, then 033°T at 4.0 kn until 0850.

   Give the 0850 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 1535 you fix your position 345°T, 2.9 nm from Kittle water tank. You steer 160°T at 4.0 kn until 1550, then 006°T at 6.4 kn until 1605.

   Give the 1605 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 1050 you fix your position 033°T, 3.6 nm from Heron Point Light. You steer 297°T at 7.1 kn until 1110, then 203°T at 4.9 kn until 1135.

   Give the 1135 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 1405 you fix your position 086°T, 2.6 nm from Tern Island tower. You steer 154°T at 8.6 kn until 1430, then 359°T at 8.3 kn until 1455.

   Give the 1455 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  

5. At 1200 you fix your position 038°T, 0.9 nm from Heron Point Light. You steer 005°T at 9.7 kn until 1215, then 245°T at 7.4 kn until 1235.

   Give the 1235 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 1145 you fix your position 008°T, 2.0 nm from Heron Point Light. You steer 055°T at 9.2 kn until 1205, then 254°T at 8.3 kn until 1225.

   Give the 1225 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 1505 you fix your position 035°T, 2.3 nm from Westfield church spire. You steer 058°T at 9.7 kn until 1525, then 188°T at 8.9 kn until 1610.

   Give the 1610 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  

8. At 1315 you fix your position 206°T, 1.4 nm from Tern Island tower. You steer 298°T at 4.4 kn until 1340, then 329°T at 7.6 kn until 1350.

   Give the 1350 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