Worksheet 530 · 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 0735 you fix your position 311°T, 3.4 nm from Tern Island tower. You steer 261°T at 6.7 kn until 0810, then 134°T at 7.3 kn until 0825.

   Give the 0825 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 0825 you fix your position 049°T, 3.2 nm from Heron Point Light. You steer 282°T at 4.9 kn until 0845, then 347°T at 4.9 kn until 0900.

   Give the 0900 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 1020 you fix your position 054°T, 1.7 nm from Heron Point Light. You steer 129°T at 7.1 kn until 1040, then 017°T at 8.3 kn until 1110.

   Give the 1110 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 0835 you fix your position 142°T, 1.3 nm from Gannet Rock daybeacon. You steer 028°T at 7.4 kn until 0915, then 290°T at 8.3 kn until 0925.

   Give the 0925 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 0725 you fix your position 217°T, 3.1 nm from Tern Island tower. You steer 321°T at 5.0 kn until 0745, then 100°T at 9.4 kn until 0805.

   Give the 0805 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  

6. At 1545 you fix your position 326°T, 2.7 nm from Kittle water tank. You steer 207°T at 5.9 kn until 1600, then 339°T at 5.4 kn until 1620.

   Give the 1620 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 0805 you fix your position 334°T, 2.7 nm from Kittle water tank. You steer 234°T at 4.1 kn until 0840, then 288°T at 9.2 kn until 0900.

   Give the 0900 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  

8. At 1155 you fix your position 069°T, 2.1 nm from Heron Point Light. You steer 054°T at 4.0 kn until 1215, then 008°T at 8.6 kn until 1240.

   Give the 1240 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