Worksheet 205 · Skill 3

Dead reckoning

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1. At 0940 you fix your position 052°T, 3.3 nm from Heron Point Light. You steer 077°T at 5.8 kn until 1000, then 310°T at 6.6 kn until 1045.

   Give the 1045 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 0910 you fix your position 044°T, 2.5 nm from Heron Point Light. You steer 293°T at 5.5 kn until 0925, then 008°T at 4.6 kn until 1005.

   Give the 1005 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 1425 you fix your position 223°T, 2.4 nm from Gannet Rock daybeacon. You steer 059°T at 7.1 kn until 1510, then 180°T at 5.7 kn until 1520.

   Give the 1520 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 0705 you fix your position 068°T, 3.0 nm from Tern Island tower. You steer 165°T at 9.8 kn until 0725, then 081°T at 8.7 kn until 0735.

   Give the 0735 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 1240 you fix your position 055°T, 2.9 nm from Heron Point Light. You steer 000°T at 5.3 kn until 1250, then 274°T at 8.1 kn until 1305.

   Give the 1305 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  

6. At 1335 you fix your position 235°T, 3.4 nm from Tern Island tower. You steer 151°T at 4.4 kn until 1400, then 034°T at 5.7 kn until 1430.

   Give the 1430 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 1130 you fix your position 144°T, 1.5 nm from Westfield church spire. You steer 027°T at 7.6 kn until 1140, then 185°T at 5.9 kn until 1150.

   Give the 1150 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 0830 you fix your position 039°T, 1.4 nm from Kittle water tank. You steer 262°T at 9.4 kn until 0840, then 034°T at 6.7 kn until 0915.

   Give the 0915 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