Worksheet 761 · 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 0730 you fix your position 332°T, 2.4 nm from Mill stack. You steer 356°T at 7.7 kn until 0755, then 237°T at 4.8 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  

2. At 0850 you fix your position 032°T, 2.4 nm from Gannet Rock daybeacon. You steer 190°T at 6.4 kn until 0930, then 289°T at 8.4 kn until 1005.

   Give the 1005 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  

3. At 1425 you fix your position 065°T, 1.3 nm from Heron Point Light. You steer 309°T at 9.1 kn until 1440, then 102°T at 6.8 kn until 1520.

   Give the 1520 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  

4. At 0820 you fix your position 027°T, 3.5 nm from Heron Point Light. You steer 035°T at 7.5 kn until 0855, then 100°T at 8.0 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 1420 you fix your position 296°T, 2.7 nm from Tern Island tower. You steer 333°T at 4.9 kn until 1435, then 104°T at 4.3 kn until 1520.

   Give the 1520 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 0840 you fix your position 058°T, 2.7 nm from Heron Point Light. You steer 309°T at 8.7 kn until 0900, then 213°T at 9.7 kn until 0910.

   Give the 0910 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  

7. At 0955 you fix your position 074°T, 1.8 nm from Tern Island tower. You steer 125°T at 5.1 kn until 1020, then 239°T at 9.0 kn until 1055.

   Give the 1055 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  

8. At 1250 you fix your position 012°T, 1.4 nm from Gannet Rock daybeacon. You steer 252°T at 4.5 kn until 1315, then 214°T at 4.8 kn until 1350.

   Give the 1350 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