Worksheet 388 · 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 1250 you fix your position 331°T, 2.3 nm from Mill stack. You steer 307°T at 7.9 kn until 1305, then 094°T at 5.9 kn until 1340.

   Give the 1340 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 0820 you fix your position 338°T, 1.4 nm from Gannet Rock daybeacon. You steer 206°T at 5.3 kn until 0900, then 001°T at 9.6 kn until 0910.

   Give the 0910 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 1120 you fix your position 344°T, 1.3 nm from Kittle water tank. You steer 084°T at 4.2 kn until 1135, then 006°T at 4.4 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  

4. At 1230 you fix your position 317°T, 1.3 nm from Tern Island tower. You steer 203°T at 7.8 kn until 1245, then 103°T at 9.9 kn until 1305.

   Give the 1305 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  

5. At 1350 you fix your position 042°T, 2.3 nm from Heron Point Light. You steer 250°T at 5.1 kn until 1400, then 132°T at 8.0 kn until 1410.

   Give the 1410 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  

6. At 0820 you fix your position 331°T, 2.6 nm from Kittle water tank. You steer 070°T at 4.8 kn until 0855, then 241°T at 5.9 kn until 0925.

   Give the 0925 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 1140 you fix your position 050°T, 2.5 nm from Mill stack. You steer 011°T at 5.9 kn until 1215, then 157°T at 9.1 kn until 1225.

   Give the 1225 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 1100 you fix your position 245°T, 2.1 nm from Tern Island tower. You steer 172°T at 5.9 kn until 1115, then 036°T at 4.2 kn until 1140.

   Give the 1140 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