Worksheet 234 · Skill 3

Dead reckoning

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1. At 1530 you fix your position 131°T, 1.8 nm from Gannet Rock daybeacon. You steer 245°T at 8.6 kn until 1555, then 289°T at 9.9 kn until 1620.

   Give the 1620 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  

2. At 0900 you fix your position 041°T, 4.5 nm from Westfield church spire. You steer 227°T at 9.4 kn until 0915, then 150°T at 6.5 kn until 0935.

   Give the 0935 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 1020 you fix your position 049°T, 2.6 nm from Heron Point Light. You steer 110°T at 5.6 kn until 1055, then 016°T at 5.0 kn until 1120.

   Give the 1120 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 1225 you fix your position 326°T, 1.4 nm from Kittle water tank. You steer 298°T at 5.2 kn until 1255, then 039°T at 8.0 kn until 1335.

   Give the 1335 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 1125 you fix your position 068°T, 4.6 nm from Tern Island tower. You steer 188°T at 8.6 kn until 1210, then 029°T at 4.9 kn until 1245.

   Give the 1245 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 1155 you fix your position 012°T, 2.0 nm from Mill stack. You steer 319°T at 4.8 kn until 1215, then 101°T at 6.9 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  

7. At 1350 you fix your position 222°T, 2.2 nm from Tern Island tower. You steer 291°T at 4.0 kn until 1420, then 325°T at 7.3 kn until 1450.

   Give the 1450 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  

8. At 1440 you fix your position 081°T, 2.3 nm from Heron Point Light. You steer 113°T at 4.3 kn until 1515, then 297°T at 4.6 kn until 1535.

   Give the 1535 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