Worksheet 538 · Skill 3

Dead reckoning

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1. At 1305 you fix your position 091°T, 3.4 nm from Westfield church spire. You steer 139°T at 7.6 kn until 1345, then 078°T at 6.6 kn until 1425.

   Give the 1425 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  

2. At 1540 you fix your position 337°T, 1.3 nm from Heron Point Light. You steer 354°T at 7.3 kn until 1555, then 029°T at 7.2 kn until 1605.

   Give the 1605 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 0835 you fix your position 029°T, 2.6 nm from Gannet Rock daybeacon. You steer 165°T at 7.5 kn until 0905, then 250°T at 5.3 kn until 0925.

   Give the 0925 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  

4. At 1530 you fix your position 095°T, 3.2 nm from Westfield church spire. You steer 032°T at 5.8 kn until 1605, then 351°T at 6.5 kn until 1615.

   Give the 1615 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 1405 you fix your position 298°T, 1.8 nm from Tern Island tower. You steer 300°T at 4.3 kn until 1435, then 166°T at 5.8 kn until 1515.

   Give the 1515 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 0730 you fix your position 051°T, 0.9 nm from Heron Point Light. You steer 317°T at 4.0 kn until 0805, then 111°T at 8.1 kn until 0845.

   Give the 0845 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  

7. At 1300 you fix your position 083°T, 2.7 nm from Tern Island tower. You steer 216°T at 9.3 kn until 1345, then 055°T at 4.6 kn until 1430.

   Give the 1430 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 0700 you fix your position 026°T, 2.3 nm from Westfield church spire. You steer 149°T at 7.2 kn until 0710, then 318°T at 7.4 kn until 0725.

   Give the 0725 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