Worksheet 195 · Skill 3

Dead reckoning

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1. At 1405 you fix your position 235°T, 2.6 nm from Gannet Rock daybeacon. You steer 152°T at 5.8 kn until 1420, then 332°T at 9.3 kn until 1435.

   Give the 1435 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 0920 you fix your position 219°T, 2.7 nm from Tern Island tower. You steer 102°T at 9.2 kn until 0935, then 257°T at 8.7 kn until 0955.

   Give the 0955 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 1350 you fix your position 068°T, 1.2 nm from Gannet Rock daybeacon. You steer 156°T at 8.3 kn until 1410, then 003°T at 5.8 kn until 1425.

   Give the 1425 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  

4. At 1425 you fix your position 037°T, 2.7 nm from Gannet Rock daybeacon. You steer 325°T at 6.0 kn until 1435, then 243°T at 9.2 kn until 1445.

   Give the 1445 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  

5. At 0810 you fix your position 104°T, 1.8 nm from Gannet Rock daybeacon. You steer 063°T at 9.3 kn until 0820, then 324°T at 6.9 kn until 0830.

   Give the 0830 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 1220 you fix your position 240°T, 3.0 nm from Tern Island tower. You steer 328°T at 4.1 kn until 1255, then 207°T at 6.0 kn until 1340.

   Give the 1340 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  

7. At 0900 you fix your position 008°T, 1.3 nm from Westfield church spire. You steer 132°T at 9.2 kn until 0910, then 350°T at 4.6 kn until 0950.

   Give the 0950 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  

8. At 0820 you fix your position 052°T, 3.6 nm from Gannet Rock daybeacon. You steer 287°T at 6.0 kn until 0850, then 048°T at 5.5 kn until 0905.

   Give the 0905 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