Worksheet 44 · Skill 3

Dead reckoning

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1. At 1545 you fix your position 104°T, 1.7 nm from Gannet Rock daybeacon. You steer 019°T at 4.1 kn until 1630, then 253°T at 6.0 kn until 1715.

   Give the 1715 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  

2. At 1040 you fix your position 066°T, 2.7 nm from Tern Island tower. You steer 186°T at 6.1 kn until 1100, then 155°T at 5.4 kn until 1140.

   Give the 1140 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  

3. At 1230 you fix your position 006°T, 1.9 nm from Heron Point Light. You steer 330°T at 5.4 kn until 1250, then 148°T at 9.5 kn until 1310.

   Give the 1310 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  

4. At 0825 you fix your position 240°T, 2.5 nm from Tern Island tower. You steer 285°T at 5.1 kn until 0900, then 217°T at 6.2 kn until 0910.

   Give the 0910 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 1510 you fix your position 046°T, 3.3 nm from Heron Point Light. You steer 064°T at 8.2 kn until 1525, then 312°T at 6.1 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  

6. At 1455 you fix your position 292°T, 1.5 nm from Gannet Rock daybeacon. You steer 145°T at 4.1 kn until 1515, then 315°T at 4.8 kn until 1530.

   Give the 1530 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  

7. At 1515 you fix your position 018°T, 1.7 nm from Heron Point Light. You steer 061°T at 4.9 kn until 1530, then 138°T at 4.6 kn until 1540.

   Give the 1540 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 0910 you fix your position 049°T, 1.6 nm from Westfield church spire. You steer 140°T at 7.0 kn until 0950, then 322°T at 6.2 kn until 1005.

   Give the 1005 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