Worksheet 366 · Skill 3

Dead reckoning

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1. At 0940 you fix your position 222°T, 1.9 nm from Gannet Rock daybeacon. You steer 233°T at 5.0 kn until 0950, then 036°T at 4.7 kn until 1005.

   Give the 1005 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 1350 you fix your position 075°T, 1.4 nm from Gannet Rock daybeacon. You steer 012°T at 5.7 kn until 1420, then 225°T at 7.1 kn until 1505.

   Give the 1505 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  

3. At 1425 you fix your position 322°T, 1.6 nm from Kittle water tank. You steer 325°T at 4.5 kn until 1445, then 203°T at 6.9 kn until 1505.

   Give the 1505 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  

4. At 1320 you fix your position 086°T, 2.3 nm from Westfield church spire. You steer 294°T at 6.7 kn until 1340, then 103°T at 5.9 kn until 1410.

   Give the 1410 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 0925 you fix your position 000°T, 1.7 nm from Kittle water tank. You steer 256°T at 4.7 kn until 0935, then 097°T at 8.2 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 1515 you fix your position 051°T, 1.3 nm from Gannet Rock daybeacon. You steer 324°T at 8.1 kn until 1540, then 037°T at 7.7 kn until 1555.

   Give the 1555 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  

7. At 1030 you fix your position 189°T, 1.8 nm from Tern Island tower. You steer 277°T at 9.7 kn until 1100, then 029°T at 4.8 kn until 1125.

   Give the 1125 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 0750 you fix your position 254°T, 2.8 nm from Tern Island tower. You steer 051°T at 5.4 kn until 0835, then 139°T at 8.3 kn until 0905.

   Give the 0905 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