Worksheet 295 · Skill 3

Dead reckoning

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1. At 1145 you fix your position 089°T, 2.6 nm from Westfield church spire. You steer 117°T at 8.6 kn until 1225, then 325°T at 8.1 kn until 1240.

   Give the 1240 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 0815 you fix your position 241°T, 2.1 nm from Tern Island tower. You steer 256°T at 5.4 kn until 0855, then 316°T at 6.8 kn until 0905.

   Give the 0905 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 1110 you fix your position 144°T, 3.3 nm from Westfield church spire. You steer 010°T at 5.1 kn until 1130, then 171°T at 4.7 kn until 1200.

   Give the 1200 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 0955 you fix your position 234°T, 1.5 nm from Tern Island tower. You steer 169°T at 7.2 kn until 1025, then 057°T at 5.4 kn until 1055.

   Give the 1055 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  

5. At 0945 you fix your position 263°T, 2.2 nm from Gannet Rock daybeacon. You steer 276°T at 8.9 kn until 1005, then 178°T at 8.3 kn until 1025.

   Give the 1025 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  

6. At 1210 you fix your position 005°T, 1.0 nm from Kittle water tank. You steer 287°T at 10.0 kn until 1240, then 188°T at 8.4 kn until 1250.

   Give the 1250 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  

7. At 1025 you fix your position 024°T, 2.7 nm from Gannet Rock daybeacon. You steer 332°T at 7.7 kn until 1035, then 188°T at 7.9 kn until 1045.

   Give the 1045 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  

8. At 1525 you fix your position 058°T, 3.5 nm from Gannet Rock daybeacon. You steer 288°T at 8.5 kn until 1535, then 183°T at 5.1 kn until 1545.

   Give the 1545 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