Worksheet 32 · Skill 3

Dead reckoning

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1. At 1030 you fix your position 077°T, 2.6 nm from Westfield church spire. You steer 138°T at 7.0 kn until 1105, then 070°T at 5.1 kn until 1120.

   Give the 1120 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 0810 you fix your position 205°T, 2.2 nm from Tern Island tower. You steer 278°T at 7.3 kn until 0820, then 311°T at 5.4 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  

3. At 1415 you fix your position 070°T, 2.7 nm from Heron Point Light. You steer 297°T at 6.8 kn until 1435, then 096°T at 5.7 kn until 1500.

   Give the 1500 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  

4. At 0700 you fix your position 098°T, 3.0 nm from Westfield church spire. You steer 011°T at 4.3 kn until 0710, then 321°T at 4.5 kn until 0740.

   Give the 0740 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 1320 you fix your position 077°T, 2.3 nm from Westfield church spire. You steer 163°T at 7.1 kn until 1330, then 062°T at 4.1 kn until 1400.

   Give the 1400 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 1555 you fix your position 354°T, 1.7 nm from Kittle water tank. You steer 061°T at 4.7 kn until 1620, then 204°T at 7.3 kn until 1635.

   Give the 1635 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 0735 you fix your position 101°T, 2.4 nm from Westfield church spire. You steer 147°T at 8.7 kn until 0745, then 233°T at 4.5 kn until 0800.

   Give the 0800 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 1005 you fix your position 064°T, 1.5 nm from Westfield church spire. You steer 303°T at 4.3 kn until 1015, then 131°T at 8.6 kn until 1030.

   Give the 1030 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