Worksheet 594 · Skill 3

Dead reckoning

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1. At 1125 you fix your position 062°T, 1.1 nm from Westfield church spire. You steer 041°T at 9.9 kn until 1150, then 198°T at 7.5 kn until 1210.

   Give the 1210 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 1235 you fix your position 255°T, 3.1 nm from Tern Island tower. You steer 167°T at 9.2 kn until 1245, then 107°T at 10.0 kn until 1325.

   Give the 1325 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 1015 you fix your position 009°T, 1.7 nm from Gannet Rock daybeacon. You steer 011°T at 7.6 kn until 1030, then 134°T at 6.3 kn until 1040.

   Give the 1040 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  

4. At 1335 you fix your position 034°T, 2.5 nm from Mill stack. You steer 256°T at 7.1 kn until 1405, then 349°T at 5.5 kn until 1420.

   Give the 1420 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 0825 you fix your position 101°T, 2.8 nm from Gannet Rock daybeacon. You steer 351°T at 9.2 kn until 0850, then 224°T at 8.8 kn until 0915.

   Give the 0915 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 1555 you fix your position 029°T, 1.7 nm from Mill stack. You steer 064°T at 7.5 kn until 1635, then 328°T at 5.6 kn until 1705.

   Give the 1705 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 1445 you fix your position 241°T, 3.2 nm from Tern Island tower. You steer 114°T at 9.6 kn until 1525, then 345°T at 7.6 kn until 1550.

   Give the 1550 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  

8. At 0900 you fix your position 197°T, 1.1 nm from Gannet Rock daybeacon. You steer 301°T at 9.8 kn until 0940, then 040°T at 4.0 kn until 1005.

   Give the 1005 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