Worksheet 754 · Skill 3

Dead reckoning

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1. At 0935 you fix your position 176°T, 1.3 nm from Westfield church spire. You steer 044°T at 7.6 kn until 0955, then 076°T at 8.8 kn until 1005.

   Give the 1005 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 0940 you fix your position 034°T, 1.6 nm from Kittle water tank. You steer 324°T at 8.0 kn until 0955, then 235°T at 10.0 kn until 1005.

   Give the 1005 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  

3. At 1120 you fix your position 002°T, 3.0 nm from Mill stack. You steer 288°T at 7.9 kn until 1130, then 092°T at 7.0 kn until 1155.

   Give the 1155 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  

4. At 1250 you fix your position 000°T, 1.5 nm from Kittle water tank. You steer 134°T at 5.2 kn until 1300, then 295°T at 10.0 kn until 1325.

   Give the 1325 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 0845 you fix your position 239°T, 2.4 nm from Gannet Rock daybeacon. You steer 220°T at 4.0 kn until 0855, then 036°T at 6.8 kn until 0935.

   Give the 0935 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 1530 you fix your position 238°T, 2.2 nm from Gannet Rock daybeacon. You steer 331°T at 5.8 kn until 1605, then 248°T at 7.9 kn until 1630.

   Give the 1630 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  

7. At 0735 you fix your position 352°T, 2.4 nm from Mill stack. You steer 090°T at 5.0 kn until 0800, then 255°T at 7.1 kn until 0815.

   Give the 0815 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  

8. At 1555 you fix your position 090°T, 1.2 nm from Heron Point Light. You steer 330°T at 8.6 kn until 1615, then 127°T at 4.2 kn until 1640.

   Give the 1640 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