Worksheet 402 · Skill 3

Dead reckoning

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1. At 1210 you fix your position 029°T, 2.4 nm from Kittle water tank. You steer 286°T at 6.0 kn until 1230, then 053°T at 4.2 kn until 1305.

   Give the 1305 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 0715 you fix your position 095°T, 1.5 nm from Heron Point Light. You steer 080°T at 5.3 kn until 0730, then 114°T at 7.0 kn until 0750.

   Give the 0750 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  

3. At 1200 you fix your position 142°T, 1.6 nm from Gannet Rock daybeacon. You steer 295°T at 7.2 kn until 1230, then 231°T at 7.5 kn until 1245.

   Give the 1245 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  

4. At 0915 you fix your position 204°T, 2.7 nm from Tern Island tower. You steer 282°T at 8.0 kn until 0955, then 134°T at 7.8 kn until 1010.

   Give the 1010 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  

5. At 1450 you fix your position 002°T, 1.0 nm from Heron Point Light. You steer 100°T at 5.9 kn until 1525, then 310°T at 9.1 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  

6. At 1535 you fix your position 253°T, 3.2 nm from Tern Island tower. You steer 291°T at 6.2 kn until 1550, then 122°T at 8.6 kn until 1625.

   Give the 1625 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 0935 you fix your position 071°T, 4.9 nm from Tern Island tower. You steer 194°T at 9.8 kn until 0955, then 088°T at 5.7 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  

8. At 0840 you fix your position 053°T, 3.0 nm from Tern Island tower. You steer 119°T at 4.1 kn until 0920, then 230°T at 4.0 kn until 0930.

   Give the 0930 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