Worksheet 204 · Skill 3

Dead reckoning

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1. At 1320 you fix your position 062°T, 2.3 nm from Gannet Rock daybeacon. You steer 340°T at 4.7 kn until 1340, then 166°T at 6.2 kn until 1415.

   Give the 1415 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  

2. At 1000 you fix your position 245°T, 2.8 nm from Tern Island tower. You steer 311°T at 8.3 kn until 1030, then 128°T at 7.6 kn until 1055.

   Give the 1055 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 1035 you fix your position 174°T, 1.0 nm from Westfield church spire. You steer 101°T at 5.1 kn until 1055, then 036°T at 5.7 kn until 1130.

   Give the 1130 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 1135 you fix your position 257°T, 2.0 nm from Gannet Rock daybeacon. You steer 286°T at 4.9 kn until 1150, then 162°T at 4.9 kn until 1225.

   Give the 1225 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  

5. At 1420 you fix your position 355°T, 1.6 nm from Gannet Rock daybeacon. You steer 120°T at 5.4 kn until 1445, then 343°T at 9.8 kn until 1455.

   Give the 1455 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  

6. At 0740 you fix your position 074°T, 2.0 nm from Westfield church spire. You steer 115°T at 7.1 kn until 0755, then 286°T at 9.9 kn until 0810.

   Give the 0810 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  

7. At 0915 you fix your position 096°T, 1.0 nm from Gannet Rock daybeacon. You steer 239°T at 9.0 kn until 0945, then 033°T at 4.4 kn until 0955.

   Give the 0955 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  

8. At 0745 you fix your position 112°T, 2.0 nm from Westfield church spire. You steer 119°T at 5.3 kn until 0815, then 316°T at 8.6 kn until 0830.

   Give the 0830 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