Worksheet 444 · Skill 3

Dead reckoning

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1. At 1355 you fix your position 326°T, 2.1 nm from Mill stack. You steer 308°T at 4.7 kn until 1425, then 049°T at 9.6 kn until 1450.

   Give the 1450 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 0845 you fix your position 082°T, 2.5 nm from Tern Island tower. You steer 169°T at 9.1 kn until 0910, then 000°T at 6.8 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  

3. At 1340 you fix your position 037°T, 3.0 nm from Tern Island tower. You steer 136°T at 9.2 kn until 1410, then 228°T at 5.6 kn until 1435.

   Give the 1435 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 0900 you fix your position 127°T, 1.5 nm from Gannet Rock daybeacon. You steer 013°T at 6.2 kn until 0910, then 082°T at 4.4 kn until 0920.

   Give the 0920 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 1145 you fix your position 085°T, 2.1 nm from Heron Point Light. You steer 036°T at 5.9 kn until 1200, then 280°T at 7.9 kn until 1235.

   Give the 1235 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 1030 you fix your position 046°T, 2.9 nm from Tern Island tower. You steer 147°T at 5.6 kn until 1110, then 100°T at 4.8 kn until 1120.

   Give the 1120 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 0810 you fix your position 268°T, 2.3 nm from Gannet Rock daybeacon. You steer 075°T at 8.1 kn until 0820, then 143°T at 5.5 kn until 0830.

   Give the 0830 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  

8. At 1040 you fix your position 233°T, 1.4 nm from Gannet Rock daybeacon. You steer 075°T at 4.3 kn until 1055, then 222°T at 4.6 kn until 1115.

   Give the 1115 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