Worksheet 202 · Skill 3

Dead reckoning

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1. At 1030 you fix your position 078°T, 1.9 nm from Gannet Rock daybeacon. You steer 309°T at 5.4 kn until 1045, then 235°T at 9.0 kn until 1105.

   Give the 1105 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  

2. At 0935 you fix your position 045°T, 4.0 nm from Westfield church spire. You steer 198°T at 7.8 kn until 1005, then 339°T at 8.5 kn until 1030.

   Give the 1030 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  

3. At 1555 you fix your position 279°T, 3.7 nm from Tern Island tower. You steer 127°T at 5.2 kn until 1610, then 168°T at 6.6 kn until 1630.

   Give the 1630 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  

4. At 1530 you fix your position 043°T, 1.8 nm from Kittle water tank. You steer 335°T at 6.1 kn until 1545, then 301°T at 6.1 kn until 1615.

   Give the 1615 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  

5. At 0715 you fix your position 266°T, 3.0 nm from Tern Island tower. You steer 039°T at 7.4 kn until 0735, then 229°T at 4.6 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  

6. At 0750 you fix your position 084°T, 1.0 nm from Gannet Rock daybeacon. You steer 062°T at 5.7 kn until 0810, then 348°T at 4.5 kn until 0840.

   Give the 0840 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  

7. At 0910 you fix your position 269°T, 1.7 nm from Gannet Rock daybeacon. You steer 033°T at 4.3 kn until 0925, then 150°T at 6.5 kn until 0945.

   Give the 0945 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 1555 you fix your position 295°T, 2.0 nm from Tern Island tower. You steer 249°T at 8.5 kn until 1620, then 346°T at 4.8 kn until 1645.

   Give the 1645 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