Worksheet 798 · Skill 3

Dead reckoning

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1. At 1035 you fix your position 121°T, 2.0 nm from Westfield church spire. You steer 115°T at 7.9 kn until 1105, then 178°T at 4.1 kn until 1115.

   Give the 1115 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  

2. At 1400 you fix your position 013°T, 2.6 nm from Tern Island tower. You steer 236°T at 6.5 kn until 1445, then 277°T at 8.4 kn until 1500.

   Give the 1500 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 0935 you fix your position 134°T, 2.8 nm from Tern Island tower. You steer 098°T at 5.6 kn until 0950, then 352°T at 6.8 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  

4. At 1005 you fix your position 096°T, 2.4 nm from Westfield church spire. You steer 339°T at 7.0 kn until 1025, then 147°T at 8.3 kn until 1105.

   Give the 1105 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  

5. At 0715 you fix your position 205°T, 3.0 nm from Tern Island tower. You steer 295°T at 8.7 kn until 0740, then 219°T at 6.6 kn until 0750.

   Give the 0750 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 0700 you fix your position 026°T, 1.7 nm from Kittle water tank. You steer 257°T at 4.9 kn until 0725, then 309°T at 5.4 kn until 0750.

   Give the 0750 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 1215 you fix your position 087°T, 1.8 nm from Heron Point Light. You steer 025°T at 6.0 kn until 1225, then 204°T at 8.4 kn until 1235.

   Give the 1235 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  

8. At 1035 you fix your position 343°T, 2.7 nm from Kittle water tank. You steer 098°T at 8.7 kn until 1050, then 016°T at 5.7 kn until 1105.

   Give the 1105 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