Worksheet 226 · Skill 3

Dead reckoning

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1. At 1105 you fix your position 101°T, 2.4 nm from Westfield church spire. You steer 332°T at 8.3 kn until 1120, then 152°T at 4.2 kn until 1135.

   Give the 1135 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  

2. At 0835 you fix your position 261°T, 1.6 nm from Gannet Rock daybeacon. You steer 108°T at 7.6 kn until 0910, then 272°T at 7.0 kn until 0920.

   Give the 0920 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  

3. At 0840 you fix your position 057°T, 2.5 nm from Heron Point Light. You steer 000°T at 4.2 kn until 0855, then 264°T at 4.9 kn until 0915.

   Give the 0915 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 1420 you fix your position 121°T, 1.1 nm from Westfield church spire. You steer 037°T at 4.0 kn until 1500, then 115°T at 4.8 kn until 1515.

   Give the 1515 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 0940 you fix your position 043°T, 0.9 nm from Heron Point Light. You steer 039°T at 4.9 kn until 1015, then 170°T at 5.0 kn until 1035.

   Give the 1035 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 0855 you fix your position 069°T, 3.9 nm from Tern Island tower. You steer 281°T at 5.1 kn until 0930, then 236°T at 7.5 kn until 1010.

   Give the 1010 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 1450 you fix your position 051°T, 2.4 nm from Heron Point Light. You steer 283°T at 6.7 kn until 1520, then 142°T at 5.9 kn until 1535.

   Give the 1535 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  

8. At 1015 you fix your position 062°T, 2.3 nm from Heron Point Light. You steer 061°T at 8.6 kn until 1040, then 200°T at 7.7 kn until 1100.

   Give the 1100 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