Worksheet 294 · Skill 3

Dead reckoning

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1. At 1045 you fix your position 025°T, 1.4 nm from Westfield church spire. You steer 018°T at 9.2 kn until 1100, then 091°T at 4.2 kn until 1145.

   Give the 1145 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 1120 you fix your position 048°T, 4.0 nm from Westfield church spire. You steer 183°T at 9.3 kn until 1135, then 330°T at 5.9 kn until 1200.

   Give the 1200 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 1525 you fix your position 072°T, 3.2 nm from Westfield church spire. You steer 124°T at 4.4 kn until 1600, then 349°T at 7.2 kn until 1635.

   Give the 1635 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 0750 you fix your position 352°T, 1.9 nm from Mill stack. You steer 079°T at 5.3 kn until 0820, then 275°T at 6.7 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  

5. At 1200 you fix your position 079°T, 3.4 nm from Westfield church spire. You steer 264°T at 4.4 kn until 1225, then 100°T at 7.8 kn until 1250.

   Give the 1250 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  

6. At 1505 you fix your position 023°T, 2.6 nm from Westfield church spire. You steer 161°T at 4.2 kn until 1540, then 208°T at 6.6 kn until 1600.

   Give the 1600 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 1350 you fix your position 215°T, 2.2 nm from Tern Island tower. You steer 198°T at 4.0 kn until 1430, then 290°T at 7.6 kn until 1450.

   Give the 1450 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 1220 you fix your position 053°T, 4.1 nm from Westfield church spire. You steer 300°T at 8.1 kn until 1230, then 250°T at 7.4 kn until 1245.

   Give the 1245 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