Worksheet 258 · Skill 3

Dead reckoning

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1. At 1025 you fix your position 044°T, 1.7 nm from Gannet Rock daybeacon. You steer 024°T at 6.0 kn until 1050, then 163°T at 9.7 kn until 1100.

   Give the 1100 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 0905 you fix your position 079°T, 2.5 nm from Gannet Rock daybeacon. You steer 326°T at 4.9 kn until 0920, then 203°T at 4.7 kn until 1000.

   Give the 1000 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 1345 you fix your position 000°T, 1.1 nm from Heron Point Light. You steer 113°T at 7.8 kn until 1415, then 083°T at 7.6 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  

4. At 1120 you fix your position 217°T, 1.2 nm from Gannet Rock daybeacon. You steer 305°T at 4.9 kn until 1205, then 346°T at 6.3 kn until 1225.

   Give the 1225 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 1520 you fix your position 085°T, 2.9 nm from Westfield church spire. You steer 285°T at 6.1 kn until 1530, then 167°T at 5.7 kn until 1610.

   Give the 1610 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 1305 you fix your position 042°T, 3.9 nm from Westfield church spire. You steer 156°T at 6.2 kn until 1345, then 029°T at 7.3 kn until 1410.

   Give the 1410 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 1405 you fix your position 022°T, 3.4 nm from Westfield church spire. You steer 160°T at 9.4 kn until 1425, then 236°T at 7.8 kn until 1435.

   Give the 1435 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 1200 you fix your position 264°T, 2.9 nm from Gannet Rock daybeacon. You steer 250°T at 6.6 kn until 1215, then 357°T at 8.5 kn until 1225.

   Give the 1225 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