Worksheet 700 · Skill 3

Dead reckoning

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1. At 0755 you fix your position 043°T, 3.5 nm from Westfield church spire. You steer 093°T at 6.7 kn until 0825, then 285°T at 4.9 kn until 0850.

   Give the 0850 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 0955 you fix your position 350°T, 1.5 nm from Gannet Rock daybeacon. You steer 024°T at 5.8 kn until 1005, then 224°T at 5.1 kn until 1030.

   Give the 1030 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  

3. At 1400 you fix your position 049°T, 1.3 nm from Kittle water tank. You steer 268°T at 5.3 kn until 1410, then 343°T at 7.7 kn until 1420.

   Give the 1420 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 1045 you fix your position 105°T, 1.8 nm from Tern Island tower. You steer 199°T at 10.0 kn until 1110, then 014°T at 9.6 kn until 1135.

   Give the 1135 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 1120 you fix your position 031°T, 2.6 nm from Mill stack. You steer 303°T at 8.8 kn until 1205, then 095°T at 4.9 kn until 1245.

   Give the 1245 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 0725 you fix your position 339°T, 2.7 nm from Kittle water tank. You steer 082°T at 5.1 kn until 0750, then 288°T at 4.0 kn until 0835.

   Give the 0835 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  

7. At 1010 you fix your position 234°T, 2.5 nm from Tern Island tower. You steer 319°T at 7.6 kn until 1030, then 209°T at 7.2 kn until 1055.

   Give the 1055 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 0735 you fix your position 087°T, 2.6 nm from Westfield church spire. You steer 043°T at 8.0 kn until 0805, then 272°T at 7.5 kn until 0840.

   Give the 0840 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