Worksheet 206 · Skill 3

Dead reckoning

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1. At 0955 you fix your position 088°T, 2.2 nm from Tern Island tower. You steer 049°T at 4.0 kn until 1005, then 191°T at 8.1 kn until 1020.

   Give the 1020 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 0700 you fix your position 060°T, 2.0 nm from Heron Point Light. You steer 034°T at 6.6 kn until 0735, then 200°T at 5.3 kn until 0800.

   Give the 0800 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 1540 you fix your position 003°T, 2.2 nm from Mill stack. You steer 086°T at 9.7 kn until 1605, then 314°T at 6.1 kn until 1615.

   Give the 1615 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 0920 you fix your position 066°T, 3.4 nm from Westfield church spire. You steer 197°T at 9.7 kn until 0935, then 012°T at 8.3 kn until 1005.

   Give the 1005 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 1225 you fix your position 037°T, 4.2 nm from Gannet Rock daybeacon. You steer 188°T at 7.4 kn until 1245, then 001°T at 5.2 kn until 1255.

   Give the 1255 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 1310 you fix your position 046°T, 2.9 nm from Heron Point Light. You steer 097°T at 4.3 kn until 1350, then 311°T at 10.0 kn until 1400.

   Give the 1400 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 1405 you fix your position 306°T, 1.4 nm from Kittle water tank. You steer 273°T at 9.2 kn until 1425, then 042°T at 9.6 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  

8. At 1310 you fix your position 224°T, 2.0 nm from Gannet Rock daybeacon. You steer 285°T at 6.3 kn until 1330, then 201°T at 7.8 kn until 1345.

   Give the 1345 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