Worksheet 308 · Skill 3

Dead reckoning

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1. At 1545 you fix your position 090°T, 3.0 nm from Westfield church spire. You steer 186°T at 9.7 kn until 1555, then 306°T at 4.3 kn until 1625.

   Give the 1625 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 1305 you fix your position 012°T, 1.4 nm from Westfield church spire. You steer 354°T at 4.3 kn until 1315, then 105°T at 4.0 kn until 1330.

   Give the 1330 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 1205 you fix your position 023°T, 2.0 nm from Kittle water tank. You steer 310°T at 8.0 kn until 1215, then 251°T at 6.6 kn until 1240.

   Give the 1240 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  

4. At 1320 you fix your position 024°T, 1.4 nm from Gannet Rock daybeacon. You steer 005°T at 6.6 kn until 1350, then 257°T at 7.2 kn until 1430.

   Give the 1430 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 1155 you fix your position 039°T, 3.1 nm from Westfield church spire. You steer 150°T at 8.7 kn until 1230, then 065°T at 8.0 kn until 1255.

   Give the 1255 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 0740 you fix your position 065°T, 3.1 nm from Westfield church spire. You steer 114°T at 6.5 kn until 0800, then 146°T at 4.7 kn until 0835.

   Give the 0835 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 1015 you fix your position 038°T, 3.7 nm from Westfield church spire. You steer 296°T at 7.3 kn until 1025, then 095°T at 7.4 kn until 1110.

   Give the 1110 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 1055 you fix your position 027°T, 1.6 nm from Gannet Rock daybeacon. You steer 146°T at 9.2 kn until 1115, then 288°T at 7.8 kn until 1130.

   Give the 1130 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