Worksheet 434 · Skill 3

Dead reckoning

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1. At 1530 you fix your position 045°T, 3.7 nm from Gannet Rock daybeacon. You steer 266°T at 8.9 kn until 1540, then 308°T at 8.3 kn until 1605.

   Give the 1605 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  

2. At 1550 you fix your position 243°T, 3.5 nm from Tern Island tower. You steer 352°T at 5.3 kn until 1615, then 048°T at 6.5 kn until 1625.

   Give the 1625 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  

3. At 0715 you fix your position 298°T, 3.8 nm from Tern Island tower. You steer 234°T at 5.4 kn until 0735, then 306°T at 4.6 kn until 0745.

   Give the 0745 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  

4. At 0725 you fix your position 069°T, 1.1 nm from Heron Point Light. You steer 115°T at 5.3 kn until 0735, then 006°T at 7.4 kn until 0750.

   Give the 0750 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  

5. At 1245 you fix your position 087°T, 1.5 nm from Heron Point Light. You steer 017°T at 9.2 kn until 1320, then 345°T at 8.5 kn until 1330.

   Give the 1330 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 1015 you fix your position 011°T, 2.1 nm from Westfield church spire. You steer 158°T at 8.8 kn until 1030, then 332°T at 9.5 kn until 1040.

   Give the 1040 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  

7. At 0930 you fix your position 022°T, 1.1 nm from Heron Point Light. You steer 096°T at 7.7 kn until 1015, then 303°T at 10.0 kn until 1030.

   Give the 1030 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 1105 you fix your position 207°T, 3.0 nm from Tern Island tower. You steer 071°T at 5.6 kn until 1150, then 172°T at 6.3 kn until 1220.

   Give the 1220 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