Worksheet 286 · Skill 3

Dead reckoning

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1. At 1345 you fix your position 144°T, 1.0 nm from Gannet Rock daybeacon. You steer 150°T at 4.6 kn until 1400, then 066°T at 6.8 kn until 1420.

   Give the 1420 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 0930 you fix your position 144°T, 2.6 nm from Tern Island tower. You steer 070°T at 7.3 kn until 0955, then 295°T at 6.9 kn until 1020.

   Give the 1020 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 1425 you fix your position 007°T, 2.5 nm from Tern Island tower. You steer 270°T at 8.1 kn until 1500, then 188°T at 4.7 kn until 1540.

   Give the 1540 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 1300 you fix your position 248°T, 1.7 nm from Tern Island tower. You steer 296°T at 9.5 kn until 1320, then 261°T at 9.7 kn until 1335.

   Give the 1335 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  

5. At 1050 you fix your position 237°T, 2.2 nm from Tern Island tower. You steer 152°T at 6.3 kn until 1125, then 280°T at 8.9 kn until 1200.

   Give the 1200 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  

6. At 0730 you fix your position 031°T, 3.3 nm from Gannet Rock daybeacon. You steer 194°T at 6.0 kn until 0740, then 278°T at 8.3 kn until 0750.

   Give the 0750 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 0845 you fix your position 280°T, 2.0 nm from Tern Island tower. You steer 269°T at 5.7 kn until 0910, then 342°T at 4.8 kn until 0935.

   Give the 0935 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 1325 you fix your position 275°T, 3.7 nm from Tern Island tower. You steer 173°T at 4.2 kn until 1340, then 293°T at 9.7 kn until 1355.

   Give the 1355 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