Worksheet 291 · Skill 3

Dead reckoning

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1. At 1225 you fix your position 086°T, 3.5 nm from Westfield church spire. You steer 295°T at 8.7 kn until 1235, then 047°T at 6.2 kn until 1250.

   Give the 1250 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  

2. At 0750 you fix your position 039°T, 3.4 nm from Heron Point Light. You steer 249°T at 8.5 kn until 0800, then 134°T at 6.2 kn until 0820.

   Give the 0820 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  

3. At 0730 you fix your position 230°T, 3.2 nm from Tern Island tower. You steer 191°T at 7.8 kn until 0750, then 308°T at 9.3 kn until 0815.

   Give the 0815 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  

4. At 1220 you fix your position 067°T, 2.6 nm from Westfield church spire. You steer 001°T at 5.4 kn until 1235, then 114°T at 6.4 kn until 1300.

   Give the 1300 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 1025 you fix your position 024°T, 1.0 nm from Kittle water tank. You steer 289°T at 4.7 kn until 1055, then 210°T at 5.3 kn until 1110.

   Give the 1110 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 1410 you fix your position 227°T, 2.4 nm from Tern Island tower. You steer 133°T at 4.0 kn until 1435, then 271°T at 9.3 kn until 1455.

   Give the 1455 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  

7. At 0910 you fix your position 117°T, 1.3 nm from Westfield church spire. You steer 086°T at 6.7 kn until 0945, then 129°T at 9.6 kn until 1015.

   Give the 1015 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 1515 you fix your position 048°T, 3.3 nm from Gannet Rock daybeacon. You steer 225°T at 8.6 kn until 1525, then 175°T at 5.8 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