Worksheet 16 · 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 1215 you fix your position 030°T, 2.9 nm from Heron Point Light. You steer 349°T at 9.6 kn until 1240, then 191°T at 8.4 kn until 1250.

   Give the 1250 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  

2. At 1035 you fix your position 109°T, 1.8 nm from Gannet Rock daybeacon. You steer 357°T at 5.2 kn until 1045, then 054°T at 8.8 kn until 1055.

   Give the 1055 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 1450 you fix your position 026°T, 2.7 nm from Westfield church spire. You steer 086°T at 5.2 kn until 1525, then 154°T at 6.9 kn until 1555.

   Give the 1555 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 1245 you fix your position 043°T, 3.5 nm from Westfield church spire. You steer 169°T at 5.0 kn until 1320, then 038°T at 8.9 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  

5. At 1030 you fix your position 088°T, 2.6 nm from Westfield church spire. You steer 088°T at 5.7 kn until 1055, then 182°T at 4.5 kn until 1135.

   Give the 1135 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  

6. At 0920 you fix your position 257°T, 2.6 nm from Gannet Rock daybeacon. You steer 137°T at 4.4 kn until 0950, then 049°T at 6.3 kn until 1010.

   Give the 1010 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 1445 you fix your position 297°T, 3.9 nm from Tern Island tower. You steer 177°T at 9.3 kn until 1505, then 086°T at 6.5 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  

8. At 0905 you fix your position 022°T, 1.6 nm from Heron Point Light. You steer 342°T at 6.9 kn until 0915, then 133°T at 4.0 kn until 0925.

   Give the 0925 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