Worksheet 611 · Skill 3

Dead reckoning

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1. At 1405 you fix your position 036°T, 2.2 nm from Kittle water tank. You steer 219°T at 5.1 kn until 1420, then 286°T at 5.5 kn until 1450.

   Give the 1450 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  

2. At 0825 you fix your position 084°T, 3.6 nm from Westfield church spire. You steer 124°T at 7.9 kn until 0850, then 323°T at 9.5 kn until 0920.

   Give the 0920 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 1415 you fix your position 075°T, 2.9 nm from Gannet Rock daybeacon. You steer 210°T at 4.3 kn until 1455, then 354°T at 6.9 kn until 1530.

   Give the 1530 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 1005 you fix your position 046°T, 1.1 nm from Westfield church spire. You steer 128°T at 9.9 kn until 1030, then 323°T at 8.1 kn until 1105.

   Give the 1105 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  

5. At 1400 you fix your position 243°T, 3.6 nm from Tern Island tower. You steer 133°T at 5.4 kn until 1410, then 184°T at 7.8 kn until 1425.

   Give the 1425 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 0735 you fix your position 098°T, 2.8 nm from Westfield church spire. You steer 258°T at 6.3 kn until 0745, then 147°T at 9.0 kn until 0805.

   Give the 0805 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 1010 you fix your position 249°T, 3.2 nm from Tern Island tower. You steer 187°T at 6.3 kn until 1020, then 024°T at 5.8 kn until 1040.

   Give the 1040 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 0905 you fix your position 079°T, 3.5 nm from Westfield church spire. You steer 177°T at 5.8 kn until 0935, then 358°T at 4.9 kn until 1005.

   Give the 1005 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