Worksheet 52 · Skill 3

Dead reckoning

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1. At 0705 you fix your position 224°T, 2.5 nm from Gannet Rock daybeacon. You steer 079°T at 4.4 kn until 0735, then 258°T at 8.4 kn until 0810.

   Give the 0810 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  

2. At 0800 you fix your position 023°T, 2.3 nm from Westfield church spire. You steer 106°T at 9.8 kn until 0825, then 263°T at 9.0 kn until 0845.

   Give the 0845 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  

3. At 1310 you fix your position 067°T, 2.2 nm from Heron Point Light. You steer 314°T at 8.7 kn until 1320, then 358°T at 4.9 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 1525 you fix your position 356°T, 2.6 nm from Mill stack. You steer 120°T at 4.9 kn until 1605, then 309°T at 6.5 kn until 1630.

   Give the 1630 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  

5. At 1200 you fix your position 354°T, 3.1 nm from Mill stack. You steer 056°T at 4.4 kn until 1230, then 201°T at 5.2 kn until 1245.

   Give the 1245 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 1040 you fix your position 206°T, 2.3 nm from Tern Island tower. You steer 053°T at 6.6 kn until 1055, then 121°T at 6.2 kn until 1140.

   Give the 1140 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  

7. At 0925 you fix your position 063°T, 3.0 nm from Heron Point Light. You steer 113°T at 5.6 kn until 1010, then 312°T at 7.2 kn until 1055.

   Give the 1055 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 0905 you fix your position 270°T, 2.2 nm from Gannet Rock daybeacon. You steer 111°T at 6.4 kn until 0945, then 291°T at 7.2 kn until 1010.

   Give the 1010 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