Worksheet 416 · Skill 3

Dead reckoning

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1. At 1115 you fix your position 085°T, 1.4 nm from Gannet Rock daybeacon. You steer 030°T at 9.5 kn until 1125, then 197°T at 7.6 kn until 1140.

   Give the 1140 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  

2. At 0955 you fix your position 331°T, 1.5 nm from Heron Point Light. You steer 022°T at 4.8 kn until 1025, then 067°T at 8.0 kn until 1040.

   Give the 1040 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 1210 you fix your position 317°T, 2.1 nm from Tern Island tower. You steer 226°T at 6.2 kn until 1245, then 110°T at 6.1 kn until 1305.

   Give the 1305 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  

4. At 0830 you fix your position 056°T, 2.7 nm from Westfield church spire. You steer 163°T at 6.9 kn until 0910, then 041°T at 6.4 kn until 0920.

   Give the 0920 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 1340 you fix your position 025°T, 3.2 nm from Westfield church spire. You steer 147°T at 9.3 kn until 1410, then 103°T at 9.6 kn until 1455.

   Give the 1455 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  

6. At 0925 you fix your position 287°T, 4.1 nm from Tern Island tower. You steer 191°T at 4.1 kn until 0940, then 025°T at 4.1 kn until 0955.

   Give the 0955 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 0745 you fix your position 069°T, 3.2 nm from Westfield church spire. You steer 149°T at 8.6 kn until 0820, then 057°T at 6.1 kn until 0855.

   Give the 0855 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 1300 you fix your position 046°T, 2.7 nm from Heron Point Light. You steer 008°T at 7.8 kn until 1330, then 279°T at 8.5 kn until 1345.

   Give the 1345 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