Worksheet 132 · Skill 3

Dead reckoning

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1. At 1545 you fix your position 160°T, 1.2 nm from Gannet Rock daybeacon. You steer 307°T at 6.8 kn until 1620, then 126°T at 7.0 kn until 1630.

   Give the 1630 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 0745 you fix your position 297°T, 1.3 nm from Gannet Rock daybeacon. You steer 187°T at 4.7 kn until 0810, then 236°T at 6.9 kn until 0830.

   Give the 0830 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  

3. At 0725 you fix your position 116°T, 1.9 nm from Gannet Rock daybeacon. You steer 336°T at 6.8 kn until 0740, then 149°T at 6.9 kn until 0805.

   Give the 0805 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  

4. At 0905 you fix your position 270°T, 1.2 nm from Gannet Rock daybeacon. You steer 277°T at 8.1 kn until 0950, then 005°T at 6.2 kn until 1030.

   Give the 1030 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 1155 you fix your position 345°T, 2.2 nm from Tern Island tower. You steer 271°T at 9.1 kn until 1230, then 176°T at 7.2 kn until 1240.

   Give the 1240 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  

6. At 0735 you fix your position 302°T, 3.8 nm from Tern Island tower. You steer 175°T at 9.9 kn until 0750, then 259°T at 8.4 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 1335 you fix your position 273°T, 2.5 nm from Gannet Rock daybeacon. You steer 216°T at 8.7 kn until 1355, then 325°T at 4.2 kn until 1430.

   Give the 1430 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 1155 you fix your position 066°T, 4.3 nm from Tern Island tower. You steer 216°T at 7.9 kn until 1205, then 113°T at 6.8 kn until 1220.

   Give the 1220 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