Worksheet 59 · Skill 3

Dead reckoning

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1. At 1555 you fix your position 009°T, 1.5 nm from Heron Point Light. You steer 040°T at 7.4 kn until 1615, then 170°T at 4.0 kn until 1635.

   Give the 1635 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 1045 you fix your position 045°T, 1.8 nm from Heron Point Light. You steer 093°T at 5.7 kn until 1120, then 210°T at 5.7 kn until 1140.

   Give the 1140 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 1055 you fix your position 223°T, 2.5 nm from Gannet Rock daybeacon. You steer 272°T at 4.7 kn until 1140, then 005°T at 6.5 kn until 1205.

   Give the 1205 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 0935 you fix your position 324°T, 3.0 nm from Kittle water tank. You steer 084°T at 9.2 kn until 0950, then 343°T at 5.8 kn until 1015.

   Give the 1015 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 1405 you fix your position 142°T, 1.9 nm from Westfield church spire. You steer 118°T at 4.9 kn until 1430, then 085°T at 5.4 kn until 1445.

   Give the 1445 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  

6. At 1600 you fix your position 248°T, 1.1 nm from Gannet Rock daybeacon. You steer 285°T at 9.0 kn until 1615, then 184°T at 4.9 kn until 1625.

   Give the 1625 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  

7. At 1230 you fix your position 155°T, 2.9 nm from Tern Island tower. You steer 268°T at 4.8 kn until 1245, then 101°T at 4.3 kn until 1315.

   Give the 1315 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  

8. At 1440 you fix your position 304°T, 3.7 nm from Tern Island tower. You steer 124°T at 5.8 kn until 1450, then 220°T at 4.2 kn until 1505.

   Give the 1505 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