Worksheet 534 · Skill 3

Dead reckoning

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1. At 0745 you fix your position 357°T, 1.4 nm from Gannet Rock daybeacon. You steer 243°T at 8.4 kn until 0830, then 025°T at 6.3 kn until 0850.

   Give the 0850 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 0910 you fix your position 314°T, 1.6 nm from Tern Island tower. You steer 317°T at 9.3 kn until 0920, then 213°T at 5.8 kn until 0940.

   Give the 0940 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  

3. At 1015 you fix your position 044°T, 2.1 nm from Kittle water tank. You steer 349°T at 4.7 kn until 1050, then 167°T at 5.4 kn until 1105.

   Give the 1105 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  

4. At 1115 you fix your position 038°T, 4.8 nm from Gannet Rock daybeacon. You steer 211°T at 7.1 kn until 1125, then 024°T at 4.0 kn until 1150.

   Give the 1150 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  

5. At 1400 you fix your position 092°T, 1.2 nm from Gannet Rock daybeacon. You steer 026°T at 7.5 kn until 1410, then 345°T at 5.4 kn until 1450.

   Give the 1450 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 1145 you fix your position 074°T, 2.2 nm from Heron Point Light. You steer 352°T at 4.5 kn until 1215, then 080°T at 5.9 kn until 1250.

   Give the 1250 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  

7. At 1420 you fix your position 030°T, 1.9 nm from Westfield church spire. You steer 089°T at 5.3 kn until 1450, then 206°T at 4.7 kn until 1500.

   Give the 1500 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  

8. At 1350 you fix your position 352°T, 1.6 nm from Heron Point Light. You steer 351°T at 8.1 kn until 1405, then 200°T at 9.4 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