Worksheet 118 · 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 0915 you fix your position 354°T, 1.5 nm from Gannet Rock daybeacon. You steer 264°T at 8.8 kn until 0940, then 015°T at 6.2 kn until 0955.

   Give the 0955 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 0810 you fix your position 045°T, 4.1 nm from Gannet Rock daybeacon. You steer 262°T at 4.8 kn until 0830, then 074°T at 6.6 kn until 0845.

   Give the 0845 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 0805 you fix your position 081°T, 2.9 nm from Gannet Rock daybeacon. You steer 272°T at 4.2 kn until 0815, then 240°T at 4.9 kn until 0840.

   Give the 0840 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 1505 you fix your position 306°T, 3.7 nm from Tern Island tower. You steer 164°T at 6.1 kn until 1530, then 128°T at 8.5 kn until 1550.

   Give the 1550 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 1540 you fix your position 304°T, 3.5 nm from Mill stack. You steer 342°T at 6.8 kn until 1625, then 158°T at 4.3 kn until 1700.

   Give the 1700 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 1105 you fix your position 087°T, 2.7 nm from Tern Island tower. You steer 326°T at 5.2 kn until 1120, then 176°T at 9.6 kn until 1145.

   Give the 1145 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  

7. At 1420 you fix your position 298°T, 2.7 nm from Tern Island tower. You steer 165°T at 9.8 kn until 1445, then 275°T at 9.9 kn until 1500.

   Give the 1500 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 0855 you fix your position 078°T, 2.4 nm from Westfield church spire. You steer 225°T at 8.5 kn until 0910, then 027°T at 8.8 kn until 0920.

   Give the 0920 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