Worksheet 728 · 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 0910 you fix your position 262°T, 2.6 nm from Tern Island tower. You steer 057°T at 5.6 kn until 0950, then 281°T at 6.0 kn until 1000.

   Give the 1000 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 1240 you fix your position 074°T, 4.1 nm from Tern Island tower. You steer 223°T at 8.5 kn until 1300, then 042°T at 5.9 kn until 1335.

   Give the 1335 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  

3. At 1250 you fix your position 169°T, 0.9 nm from Gannet Rock daybeacon. You steer 033°T at 7.3 kn until 1315, then 291°T at 9.1 kn until 1330.

   Give the 1330 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 1415 you fix your position 293°T, 3.8 nm from Tern Island tower. You steer 181°T at 8.5 kn until 1445, then 136°T at 5.3 kn until 1510.

   Give the 1510 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  

5. At 1515 you fix your position 241°T, 1.0 nm from Gannet Rock daybeacon. You steer 306°T at 4.1 kn until 1525, then 025°T at 4.6 kn until 1545.

   Give the 1545 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  

6. At 1545 you fix your position 203°T, 2.1 nm from Gannet Rock daybeacon. You steer 280°T at 8.3 kn until 1625, then 091°T at 7.5 kn until 1655.

   Give the 1655 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 1225 you fix your position 003°T, 2.2 nm from Heron Point Light. You steer 005°T at 5.5 kn until 1240, then 135°T at 7.3 kn until 1300.

   Give the 1300 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 0730 you fix your position 021°T, 2.0 nm from Heron Point Light. You steer 075°T at 6.7 kn until 0740, then 107°T at 4.2 kn until 0750.

   Give the 0750 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