Worksheet 746 · Skill 3

Dead reckoning

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1. At 1505 you fix your position 025°T, 1.3 nm from Kittle water tank. You steer 279°T at 6.4 kn until 1530, then 060°T at 8.5 kn until 1545.

   Give the 1545 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  

2. At 0910 you fix your position 011°T, 1.4 nm from Gannet Rock daybeacon. You steer 256°T at 9.9 kn until 0945, then 108°T at 6.8 kn until 1020.

   Give the 1020 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 1455 you fix your position 067°T, 1.4 nm from Heron Point Light. You steer 291°T at 5.4 kn until 1510, then 352°T at 5.6 kn until 1525.

   Give the 1525 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  

4. At 0920 you fix your position 029°T, 2.0 nm from Westfield church spire. You steer 081°T at 8.1 kn until 0935, then 222°T at 4.2 kn until 1010.

   Give the 1010 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 1445 you fix your position 319°T, 1.0 nm from Gannet Rock daybeacon. You steer 218°T at 7.5 kn until 1505, then 332°T at 9.7 kn until 1520.

   Give the 1520 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  

6. At 1150 you fix your position 068°T, 1.0 nm from Gannet Rock daybeacon. You steer 036°T at 7.4 kn until 1205, then 269°T at 5.1 kn until 1230.

   Give the 1230 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 1055 you fix your position 055°T, 3.9 nm from Westfield church spire. You steer 031°T at 6.7 kn until 1110, then 210°T at 5.6 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  

8. At 1030 you fix your position 138°T, 1.9 nm from Westfield church spire. You steer 046°T at 6.3 kn until 1040, then 109°T at 5.7 kn until 1105.

   Give the 1105 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