Worksheet 703 · Skill 3

Dead reckoning

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1. At 1450 you fix your position 095°T, 2.2 nm from Gannet Rock daybeacon. You steer 021°T at 5.5 kn until 1500, then 188°T at 4.5 kn until 1530.

   Give the 1530 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 1200 you fix your position 208°T, 2.4 nm from Gannet Rock daybeacon. You steer 281°T at 9.8 kn until 1225, then 212°T at 4.3 kn until 1240.

   Give the 1240 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 1530 you fix your position 203°T, 2.4 nm from Tern Island tower. You steer 064°T at 4.5 kn until 1540, then 126°T at 6.8 kn until 1615.

   Give the 1615 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 1020 you fix your position 064°T, 3.7 nm from Westfield church spire. You steer 165°T at 5.1 kn until 1045, then 355°T at 4.1 kn until 1120.

   Give the 1120 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  

5. At 1030 you fix your position 039°T, 4.0 nm from Gannet Rock daybeacon. You steer 300°T at 5.6 kn until 1045, then 184°T at 5.8 kn until 1105.

   Give the 1105 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 0930 you fix your position 151°T, 1.3 nm from Tern Island tower. You steer 265°T at 8.1 kn until 0955, then 086°T at 7.2 kn until 1020.

   Give the 1020 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 1345 you fix your position 355°T, 1.5 nm from Heron Point Light. You steer 004°T at 7.4 kn until 1405, then 128°T at 6.4 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  

8. At 1000 you fix your position 025°T, 1.7 nm from Kittle water tank. You steer 281°T at 6.8 kn until 1010, then 075°T at 7.6 kn until 1025.

   Give the 1025 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