Worksheet 194 · Skill 3

Dead reckoning

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1. At 1230 you fix your position 214°T, 3.1 nm from Tern Island tower. You steer 179°T at 5.1 kn until 1240, then 044°T at 5.9 kn until 1310.

   Give the 1310 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 1030 you fix your position 034°T, 1.9 nm from Westfield church spire. You steer 046°T at 6.5 kn until 1050, then 130°T at 5.7 kn until 1105.

   Give the 1105 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  

3. At 0945 you fix your position 051°T, 3.4 nm from Westfield church spire. You steer 105°T at 5.7 kn until 1010, then 194°T at 4.8 kn until 1050.

   Give the 1050 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  

4. At 1300 you fix your position 309°T, 1.3 nm from Gannet Rock daybeacon. You steer 075°T at 4.0 kn until 1345, then 022°T at 4.4 kn until 1410.

   Give the 1410 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  

5. At 0815 you fix your position 314°T, 2.9 nm from Tern Island tower. You steer 184°T at 9.3 kn until 0900, then 067°T at 6.8 kn until 0945.

   Give the 0945 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 0700 you fix your position 233°T, 3.4 nm from Tern Island tower. You steer 135°T at 6.0 kn until 0745, then 323°T at 5.6 kn until 0805.

   Give the 0805 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 0920 you fix your position 030°T, 2.6 nm from Heron Point Light. You steer 212°T at 4.4 kn until 0935, then 005°T at 4.6 kn until 0950.

   Give the 0950 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 1115 you fix your position 066°T, 3.0 nm from Westfield church spire. You steer 306°T at 4.9 kn until 1135, then 050°T at 5.0 kn until 1155.

   Give the 1155 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