Worksheet 562 · Skill 3

Dead reckoning

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1. At 1600 you fix your position 033°T, 2.7 nm from Gannet Rock daybeacon. You steer 260°T at 4.2 kn until 1630, then 051°T at 6.8 kn until 1645.

   Give the 1645 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 1535 you fix your position 303°T, 4.6 nm from Tern Island tower. You steer 180°T at 7.1 kn until 1600, then 019°T at 7.2 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  

3. At 1355 you fix your position 241°T, 2.1 nm from Tern Island tower. You steer 092°T at 5.7 kn until 1405, then 204°T at 7.4 kn until 1430.

   Give the 1430 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  

4. At 0700 you fix your position 055°T, 3.3 nm from Tern Island tower. You steer 172°T at 8.4 kn until 0745, then 096°T at 9.1 kn until 0755.

   Give the 0755 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 1100 you fix your position 043°T, 3.0 nm from Tern Island tower. You steer 136°T at 9.9 kn until 1115, then 232°T at 9.9 kn until 1125.

   Give the 1125 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 1455 you fix your position 278°T, 3.6 nm from Tern Island tower. You steer 021°T at 7.4 kn until 1510, then 269°T at 6.4 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  

7. At 1250 you fix your position 004°T, 2.3 nm from Tern Island tower. You steer 254°T at 4.4 kn until 1330, then 185°T at 7.5 kn until 1355.

   Give the 1355 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 1345 you fix your position 277°T, 3.5 nm from Tern Island tower. You steer 285°T at 7.1 kn until 1355, then 155°T at 9.3 kn until 1435.

   Give the 1435 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