Worksheet 526 · Skill 3

Dead reckoning

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1. At 1335 you fix your position 033°T, 2.3 nm from Gannet Rock daybeacon. You steer 359°T at 7.9 kn until 1350, then 267°T at 6.0 kn until 1425.

   Give the 1425 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  

2. At 1045 you fix your position 213°T, 2.5 nm from Gannet Rock daybeacon. You steer 317°T at 5.6 kn until 1055, then 241°T at 5.7 kn until 1115.

   Give the 1115 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  

3. At 0710 you fix your position 351°T, 2.7 nm from Mill stack. You steer 150°T at 5.1 kn until 0730, then 294°T at 7.6 kn until 0810.

   Give the 0810 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 1455 you fix your position 051°T, 3.2 nm from Gannet Rock daybeacon. You steer 294°T at 7.5 kn until 1540, then 228°T at 4.7 kn until 1620.

   Give the 1620 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 1400 you fix your position 036°T, 3.4 nm from Heron Point Light. You steer 087°T at 4.8 kn until 1425, then 121°T at 7.5 kn until 1500.

   Give the 1500 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  

6. At 0735 you fix your position 072°T, 3.2 nm from Westfield church spire. You steer 028°T at 6.8 kn until 0755, then 277°T at 5.8 kn until 0815.

   Give the 0815 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 1415 you fix your position 011°T, 1.6 nm from Mill stack. You steer 036°T at 8.7 kn until 1435, then 126°T at 6.5 kn until 1515.

   Give the 1515 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  

8. At 1245 you fix your position 270°T, 3.1 nm from Tern Island tower. You steer 124°T at 4.4 kn until 1300, then 013°T at 4.9 kn until 1310.

   Give the 1310 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