Worksheet 544 · Skill 3

Dead reckoning

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1. At 1330 you fix your position 039°T, 3.4 nm from Westfield church spire. You steer 151°T at 5.5 kn until 1340, then 351°T at 4.0 kn until 1405.

   Give the 1405 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 1525 you fix your position 056°T, 3.1 nm from Heron Point Light. You steer 224°T at 4.3 kn until 1540, then 080°T at 8.5 kn until 1555.

   Give the 1555 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  

3. At 1600 you fix your position 012°T, 2.2 nm from Mill stack. You steer 192°T at 7.1 kn until 1610, then 079°T at 7.5 kn until 1630.

   Give the 1630 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 0900 you fix your position 263°T, 1.8 nm from Gannet Rock daybeacon. You steer 036°T at 5.1 kn until 0920, then 221°T at 7.7 kn until 1000.

   Give the 1000 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  

5. At 0820 you fix your position 305°T, 4.1 nm from Tern Island tower. You steer 148°T at 5.7 kn until 0835, then 226°T at 8.9 kn until 0845.

   Give the 0845 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 1540 you fix your position 048°T, 2.8 nm from Westfield church spire. You steer 133°T at 6.5 kn until 1600, then 328°T at 4.2 kn until 1645.

   Give the 1645 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 1450 you fix your position 322°T, 3.0 nm from Kittle water tank. You steer 180°T at 10.0 kn until 1500, then 044°T at 5.1 kn until 1540.

   Give the 1540 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  

8. At 0940 you fix your position 028°T, 3.2 nm from Westfield church spire. You steer 179°T at 5.1 kn until 1010, then 057°T at 7.7 kn until 1050.

   Give the 1050 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