Worksheet 263 · Skill 3

Dead reckoning

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1. At 0915 you fix your position 078°T, 2.5 nm from Gannet Rock daybeacon. You steer 052°T at 4.2 kn until 0930, then 180°T at 8.9 kn until 0945.

   Give the 0945 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  

2. At 1015 you fix your position 091°T, 3.3 nm from Westfield church spire. You steer 040°T at 6.4 kn until 1050, then 078°T at 7.8 kn until 1120.

   Give the 1120 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 1440 you fix your position 025°T, 3.0 nm from Westfield church spire. You steer 120°T at 6.5 kn until 1510, then 216°T at 6.8 kn until 1540.

   Give the 1540 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 1330 you fix your position 014°T, 1.8 nm from Mill stack. You steer 300°T at 4.5 kn until 1400, then 169°T at 7.7 kn until 1415.

   Give the 1415 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  

5. At 0730 you fix your position 229°T, 2.8 nm from Tern Island tower. You steer 123°T at 4.8 kn until 0800, then 335°T at 9.1 kn until 0810.

   Give the 0810 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 1200 you fix your position 072°T, 1.8 nm from Heron Point Light. You steer 123°T at 4.1 kn until 1235, then 290°T at 6.3 kn until 1310.

   Give the 1310 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 1110 you fix your position 029°T, 2.2 nm from Mill stack. You steer 097°T at 4.9 kn until 1120, then 258°T at 7.6 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  

8. At 1125 you fix your position 347°T, 1.4 nm from Gannet Rock daybeacon. You steer 249°T at 4.9 kn until 1150, then 054°T at 8.7 kn until 1230.

   Give the 1230 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