Worksheet 466 · Skill 3

Dead reckoning

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1. At 1310 you fix your position 019°T, 2.4 nm from Heron Point Light. You steer 074°T at 5.0 kn until 1345, then 260°T at 8.5 kn until 1415.

   Give the 1415 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  

2. At 1040 you fix your position 192°T, 1.7 nm from Gannet Rock daybeacon. You steer 046°T at 8.1 kn until 1050, then 132°T at 4.2 kn until 1115.

   Give the 1115 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  

3. At 0845 you fix your position 059°T, 3.1 nm from Gannet Rock daybeacon. You steer 178°T at 4.5 kn until 0920, then 351°T at 8.0 kn until 1005.

   Give the 1005 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 0850 you fix your position 023°T, 1.5 nm from Kittle water tank. You steer 312°T at 8.9 kn until 0900, then 112°T at 4.1 kn until 0920.

   Give the 0920 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 0950 you fix your position 247°T, 2.9 nm from Tern Island tower. You steer 028°T at 5.6 kn until 1000, then 108°T at 5.4 kn until 1010.

   Give the 1010 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  

6. At 1340 you fix your position 271°T, 2.0 nm from Tern Island tower. You steer 281°T at 9.6 kn until 1415, then 111°T at 8.0 kn until 1435.

   Give the 1435 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 0915 you fix your position 065°T, 2.6 nm from Tern Island tower. You steer 145°T at 7.5 kn until 0925, then 034°T at 4.4 kn until 0950.

   Give the 0950 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 1515 you fix your position 038°T, 1.9 nm from Westfield church spire. You steer 084°T at 4.3 kn until 1525, then 019°T at 8.1 kn until 1540.

   Give the 1540 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