Worksheet 26 · Skill 3

Dead reckoning

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1. At 1310 you fix your position 099°T, 2.3 nm from Westfield church spire. You steer 100°T at 5.5 kn until 1335, then 134°T at 6.9 kn until 1355.

   Give the 1355 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  

2. At 0815 you fix your position 029°T, 3.7 nm from Heron Point Light. You steer 142°T at 9.1 kn until 0840, then 106°T at 4.6 kn until 0855.

   Give the 0855 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 0935 you fix your position 003°T, 2.1 nm from Mill stack. You steer 358°T at 4.9 kn until 1020, then 292°T at 4.4 kn until 1040.

   Give the 1040 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 0820 you fix your position 122°T, 1.6 nm from Westfield church spire. You steer 052°T at 5.8 kn until 0845, then 131°T at 6.5 kn until 0920.

   Give the 0920 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  

5. At 1300 you fix your position 199°T, 1.9 nm from Tern Island tower. You steer 233°T at 4.4 kn until 1345, then 016°T at 9.1 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 1330 you fix your position 055°T, 3.4 nm from Gannet Rock daybeacon. You steer 324°T at 9.8 kn until 1340, then 043°T at 7.9 kn until 1355.

   Give the 1355 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 1045 you fix your position 022°T, 2.2 nm from Heron Point Light. You steer 119°T at 8.0 kn until 1105, then 079°T at 5.3 kn until 1150.

   Give the 1150 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  

8. At 1325 you fix your position 066°T, 5.1 nm from Tern Island tower. You steer 179°T at 8.0 kn until 1340, then 008°T at 6.1 kn until 1350.

   Give the 1350 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