Worksheet 749 · Skill 3

Dead reckoning

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1. At 1600 you fix your position 049°T, 1.9 nm from Gannet Rock daybeacon. You steer 056°T at 6.0 kn until 1615, then 246°T at 6.7 kn until 1645.

   Give the 1645 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 0715 you fix your position 056°T, 1.5 nm from Gannet Rock daybeacon. You steer 272°T at 4.4 kn until 0740, then 222°T at 4.5 kn until 0825.

   Give the 0825 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  

3. At 0955 you fix your position 013°T, 1.8 nm from Heron Point Light. You steer 022°T at 8.4 kn until 1005, then 115°T at 4.1 kn until 1045.

   Give the 1045 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  

4. At 1155 you fix your position 276°T, 1.4 nm from Tern Island tower. You steer 296°T at 7.9 kn until 1230, then 125°T at 8.5 kn until 1240.

   Give the 1240 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 1100 you fix your position 101°T, 2.3 nm from Gannet Rock daybeacon. You steer 275°T at 4.5 kn until 1125, then 163°T at 6.8 kn until 1135.

   Give the 1135 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 0925 you fix your position 029°T, 2.6 nm from Heron Point Light. You steer 336°T at 5.1 kn until 0945, then 110°T at 9.6 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  

7. At 0710 you fix your position 009°T, 2.6 nm from Mill stack. You steer 328°T at 9.0 kn until 0725, then 181°T at 5.5 kn until 0745.

   Give the 0745 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  

8. At 1200 you fix your position 126°T, 1.2 nm from Gannet Rock daybeacon. You steer 201°T at 4.7 kn until 1210, then 100°T at 9.8 kn until 1225.

   Give the 1225 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