Worksheet 580 · 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 1335 you fix your position 263°T, 2.5 nm from Gannet Rock daybeacon. You steer 105°T at 8.2 kn until 1345, then 027°T at 4.4 kn until 1415.

   Give the 1415 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  

2. At 1510 you fix your position 226°T, 2.2 nm from Tern Island tower. You steer 341°T at 5.9 kn until 1525, then 195°T at 4.6 kn until 1540.

   Give the 1540 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 1000 you fix your position 062°T, 4.3 nm from Tern Island tower. You steer 202°T at 4.0 kn until 1040, then 242°T at 7.1 kn until 1100.

   Give the 1100 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  

4. At 1410 you fix your position 021°T, 2.6 nm from Heron Point Light. You steer 069°T at 6.5 kn until 1420, then 307°T at 4.2 kn until 1505.

   Give the 1505 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  

5. At 1315 you fix your position 261°T, 3.3 nm from Tern Island tower. You steer 220°T at 8.3 kn until 1330, then 080°T at 9.6 kn until 1340.

   Give the 1340 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 1150 you fix your position 014°T, 2.3 nm from Heron Point Light. You steer 131°T at 5.5 kn until 1225, then 340°T at 5.0 kn until 1255.

   Give the 1255 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  

7. At 0955 you fix your position 199°T, 1.2 nm from Gannet Rock daybeacon. You steer 308°T at 9.8 kn until 1010, then 084°T at 9.7 kn until 1035.

   Give the 1035 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 1330 you fix your position 120°T, 1.5 nm from Tern Island tower. You steer 071°T at 6.2 kn until 1340, then 244°T at 4.3 kn until 1350.

   Give the 1350 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