Worksheet 314 · Skill 3

Dead reckoning

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1. At 1335 you fix your position 045°T, 4.2 nm from Westfield church spire. You steer 240°T at 9.3 kn until 1350, then 177°T at 6.5 kn until 1405.

   Give the 1405 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  

2. At 1010 you fix your position 029°T, 2.2 nm from Gannet Rock daybeacon. You steer 248°T at 4.8 kn until 1055, then 110°T at 4.0 kn until 1120.

   Give the 1120 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 1310 you fix your position 289°T, 4.0 nm from Tern Island tower. You steer 032°T at 7.9 kn until 1320, then 262°T at 5.0 kn until 1355.

   Give the 1355 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  

4. At 0925 you fix your position 002°T, 1.4 nm from Heron Point Light. You steer 087°T at 6.8 kn until 0945, then 000°T at 8.7 kn until 1000.

   Give the 1000 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 0905 you fix your position 107°T, 2.6 nm from Westfield church spire. You steer 334°T at 7.4 kn until 0940, then 160°T at 9.4 kn until 1010.

   Give the 1010 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  

6. At 1325 you fix your position 160°T, 1.4 nm from Westfield church spire. You steer 095°T at 7.3 kn until 1410, then 283°T at 4.1 kn until 1445.

   Give the 1445 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  

7. At 0900 you fix your position 042°T, 4.4 nm from Gannet Rock daybeacon. You steer 196°T at 7.9 kn until 0940, then 261°T at 4.2 kn until 1000.

   Give the 1000 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  

8. At 1345 you fix your position 350°T, 3.2 nm from Mill stack. You steer 327°T at 4.4 kn until 1425, then 292°T at 4.3 kn until 1445.

   Give the 1445 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