Worksheet 382 · Skill 3

Dead reckoning

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1. At 0950 you fix your position 118°T, 1.5 nm from Gannet Rock daybeacon. You steer 109°T at 7.0 kn until 1000, then 005°T at 9.3 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 0805 you fix your position 004°T, 3.1 nm from Mill stack. You steer 266°T at 7.7 kn until 0835, then 330°T at 5.6 kn until 0845.

   Give the 0845 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  

3. At 1400 you fix your position 072°T, 1.7 nm from Tern Island tower. You steer 145°T at 7.8 kn until 1420, then 178°T at 4.0 kn until 1455.

   Give the 1455 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 1345 you fix your position 019°T, 1.9 nm from Mill stack. You steer 289°T at 7.5 kn until 1405, then 140°T at 9.7 kn until 1415.

   Give the 1415 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 1520 you fix your position 243°T, 2.0 nm from Gannet Rock daybeacon. You steer 015°T at 7.6 kn until 1540, then 100°T at 4.8 kn until 1555.

   Give the 1555 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 1335 you fix your position 061°T, 3.3 nm from Tern Island tower. You steer 165°T at 4.3 kn until 1355, then 198°T at 4.0 kn until 1440.

   Give the 1440 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 1250 you fix your position 348°T, 1.0 nm from Gannet Rock daybeacon. You steer 249°T at 5.8 kn until 1305, then 034°T at 8.2 kn until 1315.

   Give the 1315 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 1450 you fix your position 344°T, 3.0 nm from Mill stack. You steer 014°T at 5.2 kn until 1505, then 113°T at 9.7 kn until 1530.

   Give the 1530 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