Worksheet 724 · Skill 3

Dead reckoning

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1. At 1345 you fix your position 052°T, 2.4 nm from Gannet Rock daybeacon. You steer 339°T at 6.5 kn until 1355, then 160°T at 7.4 kn until 1430.

   Give the 1430 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 1225 you fix your position 054°T, 3.2 nm from Heron Point Light. You steer 313°T at 8.1 kn until 1245, then 124°T at 9.1 kn until 1300.

   Give the 1300 DR position as the true bearing FROM Heron Point Light 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 Heron Point Light: ________ °T   Distance: ________ nm  

3. At 1130 you fix your position 075°T, 1.7 nm from Westfield church spire. You steer 073°T at 5.4 kn until 1205, then 349°T at 4.9 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  

4. At 1345 you fix your position 090°T, 2.4 nm from Westfield church spire. You steer 347°T at 7.3 kn until 1405, then 145°T at 5.3 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  

5. At 0935 you fix your position 065°T, 2.6 nm from Gannet Rock daybeacon. You steer 325°T at 5.6 kn until 1005, then 182°T at 9.8 kn until 1030.

   Give the 1030 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 0925 you fix your position 262°T, 2.8 nm from Gannet Rock daybeacon. You steer 276°T at 8.5 kn until 0950, then 114°T at 9.3 kn until 1010.

   Give the 1010 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 0805 you fix your position 051°T, 3.9 nm from Westfield church spire. You steer 145°T at 7.2 kn until 0840, then 230°T at 8.1 kn until 0855.

   Give the 0855 DR position as the true bearing FROM Heron Point Light 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 Heron Point Light: ________ °T   Distance: ________ nm  

8. At 1325 you fix your position 018°T, 1.8 nm from Kittle water tank. You steer 138°T at 7.0 kn until 1340, then 339°T at 9.1 kn until 1420.

   Give the 1420 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