Worksheet 302 · Skill 3

Dead reckoning

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1. At 1145 you fix your position 019°T, 1.3 nm from Gannet Rock daybeacon. You steer 095°T at 6.8 kn until 1205, then 233°T at 6.2 kn until 1215.

   Give the 1215 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 1530 you fix your position 088°T, 2.1 nm from Heron Point Light. You steer 105°T at 5.5 kn until 1545, then 040°T at 8.9 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  

3. At 1020 you fix your position 249°T, 2.6 nm from Tern Island tower. You steer 135°T at 4.0 kn until 1040, then 322°T at 6.6 kn until 1125.

   Give the 1125 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  

4. At 1450 you fix your position 344°T, 2.2 nm from Tern Island tower. You steer 287°T at 9.9 kn until 1500, then 108°T at 5.5 kn until 1545.

   Give the 1545 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 1205 you fix your position 243°T, 1.3 nm from Gannet Rock daybeacon. You steer 235°T at 5.9 kn until 1240, then 093°T at 7.0 kn until 1300.

   Give the 1300 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  

6. At 1155 you fix your position 200°T, 1.1 nm from Gannet Rock daybeacon. You steer 292°T at 7.9 kn until 1215, then 053°T at 9.9 kn until 1245.

   Give the 1245 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 1600 you fix your position 020°T, 2.0 nm from Kittle water tank. You steer 313°T at 5.9 kn until 1635, then 049°T at 8.3 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  

8. At 0920 you fix your position 235°T, 1.5 nm from Tern Island tower. You steer 305°T at 9.1 kn until 0940, then 251°T at 6.5 kn until 1010.

   Give the 1010 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