Worksheet 394 · Skill 3

Dead reckoning

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1. At 1155 you fix your position 063°T, 2.9 nm from Westfield church spire. You steer 197°T at 6.8 kn until 1215, then 059°T at 4.6 kn until 1255.

   Give the 1255 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 1105 you fix your position 066°T, 2.2 nm from Tern Island tower. You steer 146°T at 7.3 kn until 1145, then 340°T at 7.4 kn until 1155.

   Give the 1155 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  

3. At 1240 you fix your position 075°T, 2.8 nm from Westfield church spire. You steer 196°T at 5.0 kn until 1300, then 039°T at 9.3 kn until 1325.

   Give the 1325 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 1320 you fix your position 041°T, 3.9 nm from Gannet Rock daybeacon. You steer 208°T at 7.4 kn until 1340, then 116°T at 8.1 kn until 1355.

   Give the 1355 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 1245 you fix your position 041°T, 1.4 nm from Heron Point Light. You steer 092°T at 8.9 kn until 1300, then 299°T at 8.1 kn until 1335.

   Give the 1335 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 0730 you fix your position 048°T, 2.9 nm from Heron Point Light. You steer 333°T at 4.8 kn until 0740, then 052°T at 8.6 kn until 0755.

   Give the 0755 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 1025 you fix your position 039°T, 2.4 nm from Heron Point Light. You steer 017°T at 5.1 kn until 1105, then 155°T at 7.6 kn until 1120.

   Give the 1120 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 1110 you fix your position 056°T, 1.5 nm from Kittle water tank. You steer 024°T at 4.0 kn until 1130, then 257°T at 5.8 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