Worksheet 292 · Skill 3

Dead reckoning

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1. At 1445 you fix your position 060°T, 3.6 nm from Westfield church spire. You steer 106°T at 7.0 kn until 1500, then 173°T at 9.2 kn until 1525.

   Give the 1525 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 1150 you fix your position 056°T, 3.6 nm from Tern Island tower. You steer 262°T at 5.1 kn until 1210, then 189°T at 4.0 kn until 1220.

   Give the 1220 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 0735 you fix your position 045°T, 2.2 nm from Gannet Rock daybeacon. You steer 010°T at 6.5 kn until 0805, then 178°T at 9.8 kn until 0840.

   Give the 0840 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 0710 you fix your position 063°T, 1.4 nm from Gannet Rock daybeacon. You steer 087°T at 8.2 kn until 0725, then 251°T at 8.6 kn until 0745.

   Give the 0745 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 1500 you fix your position 074°T, 1.6 nm from Tern Island tower. You steer 014°T at 8.1 kn until 1515, then 165°T at 5.4 kn until 1555.

   Give the 1555 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  

6. At 1335 you fix your position 276°T, 2.1 nm from Tern Island tower. You steer 068°T at 7.3 kn until 1345, then 236°T at 6.8 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  

7. At 0810 you fix your position 190°T, 2.1 nm from Tern Island tower. You steer 241°T at 4.5 kn until 0830, then 287°T at 4.6 kn until 0915.

   Give the 0915 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 1245 you fix your position 063°T, 3.8 nm from Westfield church spire. You steer 163°T at 9.3 kn until 1305, then 129°T at 5.2 kn until 1350.

   Give the 1350 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