Worksheet 27 · 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 1300 you fix your position 008°T, 1.3 nm from Tern Island tower. You steer 111°T at 9.6 kn until 1320, then 287°T at 8.5 kn until 1405.

   Give the 1405 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 0920 you fix your position 292°T, 1.0 nm from Gannet Rock daybeacon. You steer 146°T at 8.7 kn until 0940, then 260°T at 9.7 kn until 0950.

   Give the 0950 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 0700 you fix your position 286°T, 1.8 nm from Gannet Rock daybeacon. You steer 068°T at 5.7 kn until 0735, then 032°T at 6.9 kn until 0805.

   Give the 0805 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 0935 you fix your position 224°T, 3.3 nm from Tern Island tower. You steer 144°T at 4.9 kn until 0950, then 338°T at 8.4 kn until 1005.

   Give the 1005 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 1250 you fix your position 249°T, 3.4 nm from Tern Island tower. You steer 337°T at 9.9 kn until 1315, then 197°T at 6.5 kn until 1340.

   Give the 1340 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  

6. At 1335 you fix your position 036°T, 2.3 nm from Westfield church spire. You steer 127°T at 4.1 kn until 1415, then 001°T at 4.0 kn until 1430.

   Give the 1430 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  

7. At 0955 you fix your position 085°T, 2.4 nm from Westfield church spire. You steer 112°T at 7.3 kn until 1005, then 301°T at 4.4 kn until 1020.

   Give the 1020 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 1105 you fix your position 072°T, 3.6 nm from Tern Island tower. You steer 296°T at 5.2 kn until 1115, then 145°T at 7.6 kn until 1145.

   Give the 1145 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