Worksheet 351 · Skill 3

Dead reckoning

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1. At 1005 you fix your position 068°T, 1.1 nm from Heron Point Light. You steer 297°T at 4.8 kn until 1030, then 007°T at 5.9 kn until 1045.

   Give the 1045 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 1555 you fix your position 313°T, 1.2 nm from Tern Island tower. You steer 253°T at 6.0 kn until 1625, then 003°T at 8.5 kn until 1640.

   Give the 1640 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 1455 you fix your position 088°T, 2.3 nm from Westfield church spire. You steer 351°T at 4.3 kn until 1525, then 113°T at 5.4 kn until 1600.

   Give the 1600 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 1530 you fix your position 001°T, 1.6 nm from Mill stack. You steer 061°T at 4.8 kn until 1545, then 127°T at 4.7 kn until 1610.

   Give the 1610 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 1005 you fix your position 094°T, 3.0 nm from Westfield church spire. You steer 331°T at 5.7 kn until 1025, then 147°T at 8.8 kn until 1110.

   Give the 1110 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  

6. At 0930 you fix your position 078°T, 2.4 nm from Westfield church spire. You steer 349°T at 5.9 kn until 1000, then 164°T at 5.2 kn until 1010.

   Give the 1010 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 1350 you fix your position 024°T, 3.8 nm from Westfield church spire. You steer 234°T at 5.7 kn until 1400, then 115°T at 6.2 kn until 1435.

   Give the 1435 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 0725 you fix your position 097°T, 2.6 nm from Westfield church spire. You steer 193°T at 9.0 kn until 0735, then 314°T at 6.9 kn until 0750.

   Give the 0750 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