Worksheet 414 · Skill 3

Dead reckoning

Print this worksheet Next sheet

Plot Pass worksheet. Plot Pass $1.95/month or $19.50/year · Free during preview. Plotroom · cedarpointmarina.net · invented chart, not for navigation.

1. At 0905 you fix your position 039°T, 2.2 nm from Westfield church spire. You steer 349°T at 4.7 kn until 0920, then 078°T at 4.1 kn until 0950.

   Give the 0950 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 1135 you fix your position 159°T, 1.7 nm from Westfield church spire. You steer 024°T at 4.9 kn until 1155, then 343°T at 9.5 kn until 1210.

   Give the 1210 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 0720 you fix your position 336°T, 1.5 nm from Kittle water tank. You steer 253°T at 9.9 kn until 0730, then 075°T at 6.6 kn until 0805.

   Give the 0805 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  

4. At 0710 you fix your position 325°T, 3.1 nm from Kittle water tank. You steer 274°T at 5.1 kn until 0755, then 067°T at 4.7 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  

5. At 1025 you fix your position 071°T, 3.5 nm from Westfield church spire. You steer 106°T at 4.4 kn until 1105, then 186°T at 7.4 kn until 1130.

   Give the 1130 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 0740 you fix your position 316°T, 2.1 nm from Tern Island tower. You steer 012°T at 5.7 kn until 0750, then 213°T at 8.3 kn until 0825.

   Give the 0825 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  

7. At 1510 you fix your position 265°T, 3.5 nm from Tern Island tower. You steer 019°T at 8.0 kn until 1530, then 283°T at 4.6 kn until 1540.

   Give the 1540 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 1105 you fix your position 022°T, 2.0 nm from Heron Point Light. You steer 279°T at 4.8 kn until 1125, then 002°T at 6.3 kn until 1155.

   Give the 1155 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