Worksheet 243 · 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 1315 you fix your position 047°T, 3.3 nm from Gannet Rock daybeacon. You steer 320°T at 8.0 kn until 1325, then 010°T at 4.9 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  

2. At 1055 you fix your position 038°T, 4.5 nm from Gannet Rock daybeacon. You steer 179°T at 4.0 kn until 1130, then 282°T at 4.9 kn until 1200.

   Give the 1200 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 1405 you fix your position 225°T, 1.0 nm from Gannet Rock daybeacon. You steer 086°T at 8.3 kn until 1415, then 028°T at 6.6 kn until 1430.

   Give the 1430 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 0710 you fix your position 237°T, 2.3 nm from Gannet Rock daybeacon. You steer 148°T at 6.3 kn until 0725, then 275°T at 4.7 kn until 0805.

   Give the 0805 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 1450 you fix your position 294°T, 3.8 nm from Tern Island tower. You steer 266°T at 5.3 kn until 1520, then 084°T at 5.7 kn until 1600.

   Give the 1600 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 0905 you fix your position 016°T, 1.2 nm from Gannet Rock daybeacon. You steer 024°T at 8.8 kn until 0920, then 183°T at 8.1 kn until 1000.

   Give the 1000 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 0735 you fix your position 040°T, 1.6 nm from Heron Point Light. You steer 324°T at 4.5 kn until 0820, then 133°T at 4.4 kn until 0840.

   Give the 0840 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  

8. At 0920 you fix your position 058°T, 1.7 nm from Tern Island tower. You steer 353°T at 4.6 kn until 0940, then 123°T at 6.2 kn until 0950.

   Give the 0950 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