Worksheet 334 · Skill 3

Dead reckoning

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1. At 1255 you fix your position 222°T, 2.1 nm from Tern Island tower. You steer 085°T at 8.8 kn until 1325, then 033°T at 6.4 kn until 1350.

   Give the 1350 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 0850 you fix your position 083°T, 2.0 nm from Westfield church spire. You steer 355°T at 4.6 kn until 0920, then 132°T at 6.4 kn until 0940.

   Give the 0940 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 053°T, 2.2 nm from Westfield church spire. You steer 136°T at 4.7 kn until 1330, then 007°T at 9.7 kn until 1350.

   Give the 1350 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 0950 you fix your position 043°T, 3.1 nm from Gannet Rock daybeacon. You steer 025°T at 8.0 kn until 1005, then 218°T at 8.6 kn until 1030.

   Give the 1030 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  

5. At 0705 you fix your position 018°T, 2.5 nm from Heron Point Light. You steer 107°T at 4.6 kn until 0740, then 043°T at 5.3 kn until 0800.

   Give the 0800 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 1320 you fix your position 254°T, 1.3 nm from Gannet Rock daybeacon. You steer 241°T at 6.9 kn until 1340, then 338°T at 9.8 kn until 1355.

   Give the 1355 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 1115 you fix your position 046°T, 3.2 nm from Gannet Rock daybeacon. You steer 324°T at 5.8 kn until 1130, then 275°T at 8.5 kn until 1215.

   Give the 1215 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 1505 you fix your position 323°T, 3.1 nm from Kittle water tank. You steer 258°T at 6.8 kn until 1520, then 079°T at 5.8 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