Worksheet 494 · 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 1430 you fix your position 073°T, 3.2 nm from Westfield church spire. You steer 155°T at 6.7 kn until 1440, then 287°T at 9.2 kn until 1450.

   Give the 1450 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 1115 you fix your position 033°T, 3.2 nm from Gannet Rock daybeacon. You steer 150°T at 9.8 kn until 1130, then 278°T at 6.0 kn until 1150.

   Give the 1150 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 1355 you fix your position 115°T, 1.6 nm from Westfield church spire. You steer 001°T at 8.1 kn until 1410, then 090°T at 8.1 kn until 1425.

   Give the 1425 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 0835 you fix your position 067°T, 2.0 nm from Tern Island tower. You steer 158°T at 8.8 kn until 0900, then 342°T at 7.5 kn until 0920.

   Give the 0920 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 0850 you fix your position 175°T, 1.3 nm from Gannet Rock daybeacon. You steer 117°T at 6.2 kn until 0910, then 356°T at 7.5 kn until 0920.

   Give the 0920 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  

6. At 0945 you fix your position 082°T, 2.0 nm from Gannet Rock daybeacon. You steer 002°T at 7.9 kn until 1020, then 250°T at 6.1 kn until 1045.

   Give the 1045 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 0735 you fix your position 029°T, 2.2 nm from Kittle water tank. You steer 240°T at 5.7 kn until 0755, then 021°T at 9.0 kn until 0810.

   Give the 0810 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 1005 you fix your position 040°T, 1.1 nm from Heron Point Light. You steer 001°T at 7.9 kn until 1020, then 185°T at 4.6 kn until 1045.

   Give the 1045 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