Worksheet 597 · Skill 3

Dead reckoning

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1. At 1355 you fix your position 055°T, 2.0 nm from Westfield church spire. You steer 347°T at 5.8 kn until 1405, then 262°T at 8.9 kn until 1415.

   Give the 1415 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 1345 you fix your position 037°T, 2.8 nm from Gannet Rock daybeacon. You steer 014°T at 5.3 kn until 1415, then 203°T at 4.7 kn until 1435.

   Give the 1435 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  

3. At 1215 you fix your position 060°T, 2.1 nm from Westfield church spire. You steer 130°T at 5.7 kn until 1230, then 170°T at 4.3 kn until 1240.

   Give the 1240 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 1410 you fix your position 305°T, 1.4 nm from Kittle water tank. You steer 296°T at 9.4 kn until 1420, then 052°T at 8.3 kn until 1435.

   Give the 1435 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  

5. At 1515 you fix your position 312°T, 1.8 nm from Tern Island tower. You steer 238°T at 6.4 kn until 1545, then 049°T at 6.9 kn until 1625.

   Give the 1625 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 1425 you fix your position 033°T, 3.5 nm from Westfield church spire. You steer 115°T at 4.1 kn until 1500, then 269°T at 5.2 kn until 1510.

   Give the 1510 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 0715 you fix your position 348°T, 3.1 nm from Mill stack. You steer 227°T at 6.7 kn until 0725, then 125°T at 9.6 kn until 0740.

   Give the 0740 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  

8. At 1500 you fix your position 041°T, 2.3 nm from Mill stack. You steer 074°T at 6.8 kn until 1540, then 265°T at 9.0 kn until 1555.

   Give the 1555 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