Worksheet 656 · Skill 3

Dead reckoning

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1. At 0945 you fix your position 091°T, 1.2 nm from Gannet Rock daybeacon. You steer 025°T at 4.8 kn until 1005, then 273°T at 7.7 kn until 1025.

   Give the 1025 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 0805 you fix your position 253°T, 2.3 nm from Tern Island tower. You steer 180°T at 5.2 kn until 0815, then 113°T at 4.9 kn until 0845.

   Give the 0845 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 0750 you fix your position 359°T, 3.2 nm from Mill stack. You steer 321°T at 8.4 kn until 0820, then 159°T at 6.5 kn until 0855.

   Give the 0855 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 1040 you fix your position 210°T, 2.1 nm from Gannet Rock daybeacon. You steer 311°T at 5.5 kn until 1105, then 009°T at 8.7 kn until 1115.

   Give the 1115 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 1255 you fix your position 009°T, 2.4 nm from Mill stack. You steer 071°T at 9.4 kn until 1310, then 020°T at 4.6 kn until 1330.

   Give the 1330 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 1405 you fix your position 331°T, 1.4 nm from Kittle water tank. You steer 079°T at 7.3 kn until 1415, then 283°T at 4.4 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  

7. At 1055 you fix your position 037°T, 2.6 nm from Heron Point Light. You steer 042°T at 4.1 kn until 1140, then 132°T at 5.9 kn until 1215.

   Give the 1215 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 1450 you fix your position 077°T, 2.6 nm from Westfield church spire. You steer 170°T at 5.3 kn until 1505, then 251°T at 7.0 kn until 1515.

   Give the 1515 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