Worksheet 559 · 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 0700 you fix your position 236°T, 3.1 nm from Tern Island tower. You steer 019°T at 5.8 kn until 0735, then 268°T at 4.1 kn until 0745.

   Give the 0745 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 0700 you fix your position 009°T, 1.2 nm from Gannet Rock daybeacon. You steer 152°T at 8.1 kn until 0720, then 297°T at 9.8 kn until 0730.

   Give the 0730 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  

3. At 0845 you fix your position 077°T, 3.1 nm from Westfield church spire. You steer 167°T at 5.5 kn until 0925, then 007°T at 5.0 kn until 0940.

   Give the 0940 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  

4. At 1250 you fix your position 328°T, 1.1 nm from Gannet Rock daybeacon. You steer 048°T at 8.2 kn until 1315, then 220°T at 5.8 kn until 1335.

   Give the 1335 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 0715 you fix your position 176°T, 1.3 nm from Westfield church spire. You steer 087°T at 8.2 kn until 0740, then 026°T at 9.8 kn until 0750.

   Give the 0750 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 1000 you fix your position 220°T, 2.7 nm from Tern Island tower. You steer 299°T at 5.0 kn until 1040, then 135°T at 5.6 kn until 1050.

   Give the 1050 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  

7. At 0920 you fix your position 042°T, 2.4 nm from Gannet Rock daybeacon. You steer 283°T at 6.6 kn until 0935, then 136°T at 7.5 kn until 0945.

   Give the 0945 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 1100 you fix your position 204°T, 2.2 nm from Gannet Rock daybeacon. You steer 272°T at 4.5 kn until 1120, then 311°T at 4.5 kn until 1145.

   Give the 1145 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