Worksheet 504 · Skill 3

Dead reckoning

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1. At 1220 you fix your position 272°T, 2.5 nm from Gannet Rock daybeacon. You steer 214°T at 7.8 kn until 1235, then 039°T at 8.4 kn until 1245.

   Give the 1245 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 0720 you fix your position 065°T, 1.4 nm from Heron Point Light. You steer 311°T at 8.5 kn until 0730, then 359°T at 4.7 kn until 0805.

   Give the 0805 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  

3. At 1515 you fix your position 313°T, 1.3 nm from Kittle water tank. You steer 319°T at 9.5 kn until 1550, then 181°T at 8.4 kn until 1600.

   Give the 1600 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  

4. At 0700 you fix your position 356°T, 2.6 nm from Mill stack. You steer 104°T at 6.4 kn until 0735, then 042°T at 5.6 kn until 0755.

   Give the 0755 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 0935 you fix your position 028°T, 3.4 nm from Gannet Rock daybeacon. You steer 169°T at 7.8 kn until 1005, then 276°T at 4.6 kn until 1030.

   Give the 1030 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  

6. At 1035 you fix your position 016°T, 2.3 nm from Heron Point Light. You steer 112°T at 5.6 kn until 1045, then 323°T at 7.2 kn until 1115.

   Give the 1115 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  

7. At 1215 you fix your position 034°T, 3.8 nm from Gannet Rock daybeacon. You steer 178°T at 4.8 kn until 1235, then 009°T at 6.0 kn until 1245.

   Give the 1245 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 0945 you fix your position 021°T, 2.7 nm from Heron Point Light. You steer 132°T at 10.0 kn until 1000, then 053°T at 6.7 kn until 1040.

   Give the 1040 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