Worksheet 799 · Skill 3

Dead reckoning

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1. At 1150 you fix your position 040°T, 2.4 nm from Heron Point Light. You steer 076°T at 6.2 kn until 1225, then 270°T at 6.3 kn until 1310.

   Give the 1310 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  

2. At 1505 you fix your position 068°T, 3.4 nm from Westfield church spire. You steer 175°T at 6.0 kn until 1535, then 139°T at 4.5 kn until 1550.

   Give the 1550 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  

3. At 1025 you fix your position 128°T, 1.7 nm from Gannet Rock daybeacon. You steer 342°T at 4.6 kn until 1040, then 201°T at 6.1 kn until 1100.

   Give the 1100 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 1335 you fix your position 026°T, 3.3 nm from Heron Point Light. You steer 175°T at 5.8 kn until 1345, then 223°T at 7.5 kn until 1355.

   Give the 1355 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 0835 you fix your position 105°T, 2.0 nm from Gannet Rock daybeacon. You steer 267°T at 6.4 kn until 0920, then 334°T at 8.7 kn until 0930.

   Give the 0930 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 0915 you fix your position 026°T, 3.1 nm from Heron Point Light. You steer 211°T at 8.7 kn until 0930, then 341°T at 4.4 kn until 1000.

   Give the 1000 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  

7. At 1110 you fix your position 048°T, 1.7 nm from Heron Point Light. You steer 321°T at 8.3 kn until 1125, then 059°T at 5.9 kn until 1200.

   Give the 1200 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 1045 you fix your position 261°T, 2.3 nm from Tern Island tower. You steer 141°T at 4.6 kn until 1130, then 030°T at 7.2 kn until 1200.

   Give the 1200 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