Worksheet 677 · Skill 3

Dead reckoning

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1. At 1555 you fix your position 055°T, 2.2 nm from Gannet Rock daybeacon. You steer 156°T at 6.1 kn until 1615, then 203°T at 6.4 kn until 1625.

   Give the 1625 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 1150 you fix your position 342°T, 1.6 nm from Gannet Rock daybeacon. You steer 258°T at 8.9 kn until 1205, then 128°T at 7.1 kn until 1250.

   Give the 1250 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 0715 you fix your position 354°T, 2.4 nm from Mill stack. You steer 125°T at 7.6 kn until 0725, then 067°T at 5.5 kn until 0800.

   Give the 0800 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 1355 you fix your position 261°T, 0.8 nm from Gannet Rock daybeacon. You steer 351°T at 6.7 kn until 1410, then 226°T at 8.2 kn until 1425.

   Give the 1425 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 1355 you fix your position 044°T, 3.9 nm from Westfield church spire. You steer 099°T at 10.0 kn until 1405, then 264°T at 8.9 kn until 1435.

   Give the 1435 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 1440 you fix your position 302°T, 1.9 nm from Tern Island tower. You steer 192°T at 8.0 kn until 1515, then 062°T at 5.3 kn until 1540.

   Give the 1540 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 0905 you fix your position 244°T, 3.4 nm from Tern Island tower. You steer 336°T at 6.9 kn until 0925, then 157°T at 4.4 kn until 0950.

   Give the 0950 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 1450 you fix your position 322°T, 3.2 nm from Kittle water tank. You steer 107°T at 5.4 kn until 1525, then 348°T at 5.7 kn until 1535.

   Give the 1535 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