Worksheet 554 · Skill 3

Dead reckoning

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1. At 1335 you fix your position 007°T, 0.8 nm from Heron Point Light. You steer 118°T at 7.7 kn until 1355, then 355°T at 7.1 kn until 1410.

   Give the 1410 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  

2. At 0720 you fix your position 244°T, 1.8 nm from Gannet Rock daybeacon. You steer 310°T at 6.0 kn until 0735, then 034°T at 9.2 kn until 0745.

   Give the 0745 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 1035 you fix your position 022°T, 2.7 nm from Mill stack. You steer 010°T at 5.0 kn until 1050, then 259°T at 6.9 kn until 1115.

   Give the 1115 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  

4. At 0825 you fix your position 229°T, 1.6 nm from Gannet Rock daybeacon. You steer 013°T at 5.4 kn until 0900, then 153°T at 5.8 kn until 0925.

   Give the 0925 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  

5. At 1225 you fix your position 080°T, 1.7 nm from Tern Island tower. You steer 184°T at 5.1 kn until 1235, then 036°T at 8.8 kn until 1250.

   Give the 1250 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  

6. At 1350 you fix your position 086°T, 1.9 nm from Westfield church spire. You steer 304°T at 4.4 kn until 1405, then 045°T at 4.6 kn until 1420.

   Give the 1420 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  

7. At 0905 you fix your position 344°T, 3.2 nm from Kittle water tank. You steer 114°T at 4.5 kn until 0915, then 073°T at 4.8 kn until 0935.

   Give the 0935 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 1415 you fix your position 023°T, 2.3 nm from Gannet Rock daybeacon. You steer 245°T at 10.0 kn until 1435, then 155°T at 6.0 kn until 1510.

   Give the 1510 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