Worksheet 162 · Skill 3

Dead reckoning

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1. At 1155 you fix your position 028°T, 3.1 nm from Heron Point Light. You steer 053°T at 4.3 kn until 1225, then 195°T at 7.7 kn until 1245.

   Give the 1245 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  

2. At 0745 you fix your position 021°T, 2.0 nm from Kittle water tank. You steer 020°T at 7.5 kn until 0755, then 157°T at 5.8 kn until 0815.

   Give the 0815 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  

3. At 1515 you fix your position 185°T, 1.3 nm from Tern Island tower. You steer 220°T at 5.8 kn until 1550, then 260°T at 8.8 kn until 1600.

   Give the 1600 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 1405 you fix your position 024°T, 2.1 nm from Gannet Rock daybeacon. You steer 119°T at 5.1 kn until 1430, then 312°T at 8.9 kn until 1510.

   Give the 1510 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 1040 you fix your position 286°T, 3.6 nm from Tern Island tower. You steer 170°T at 9.6 kn until 1100, then 120°T at 8.2 kn until 1110.

   Give the 1110 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 1535 you fix your position 221°T, 2.7 nm from Tern Island tower. You steer 118°T at 9.1 kn until 1555, then 248°T at 9.5 kn until 1610.

   Give the 1610 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  

7. At 1410 you fix your position 022°T, 2.9 nm from Heron Point Light. You steer 347°T at 6.1 kn until 1440, then 207°T at 4.6 kn until 1525.

   Give the 1525 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 1020 you fix your position 039°T, 3.0 nm from Gannet Rock daybeacon. You steer 195°T at 4.8 kn until 1055, then 140°T at 5.1 kn until 1130.

   Give the 1130 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