Worksheet 189 · 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 0735 you fix your position 076°T, 2.3 nm from Heron Point Light. You steer 300°T at 8.0 kn until 0750, then 132°T at 6.2 kn until 0815.

   Give the 0815 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  

2. At 1350 you fix your position 283°T, 2.0 nm from Gannet Rock daybeacon. You steer 311°T at 8.1 kn until 1430, then 078°T at 4.5 kn until 1450.

   Give the 1450 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 1240 you fix your position 290°T, 1.7 nm from Tern Island tower. You steer 054°T at 4.3 kn until 1305, then 117°T at 4.8 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  

4. At 1250 you fix your position 338°T, 1.4 nm from Tern Island tower. You steer 293°T at 5.9 kn until 1300, then 219°T at 6.6 kn until 1315.

   Give the 1315 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 1515 you fix your position 293°T, 3.6 nm from Tern Island tower. You steer 279°T at 4.9 kn until 1525, then 120°T at 5.2 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  

6. At 1210 you fix your position 072°T, 3.1 nm from Gannet Rock daybeacon. You steer 249°T at 8.4 kn until 1225, then 297°T at 4.9 kn until 1245.

   Give the 1245 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 0725 you fix your position 058°T, 3.3 nm from Heron Point Light. You steer 234°T at 6.9 kn until 0735, then 172°T at 4.4 kn until 0745.

   Give the 0745 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 1100 you fix your position 088°T, 3.7 nm from Westfield church spire. You steer 137°T at 8.7 kn until 1135, then 076°T at 4.0 kn until 1215.

   Give the 1215 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