Worksheet 765 · 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 022°T, 2.8 nm from Heron Point Light. You steer 062°T at 7.1 kn until 1335, then 275°T at 5.8 kn until 1405.

   Give the 1405 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 1045 you fix your position 244°T, 2.5 nm from Tern Island tower. You steer 091°T at 7.5 kn until 1125, then 050°T at 4.4 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  

3. At 1535 you fix your position 326°T, 2.3 nm from Mill stack. You steer 323°T at 4.8 kn until 1610, then 012°T at 7.9 kn until 1625.

   Give the 1625 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  

4. At 0835 you fix your position 080°T, 1.9 nm from Westfield church spire. You steer 059°T at 7.2 kn until 0855, then 277°T at 4.4 kn until 0940.

   Give the 0940 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  

5. At 0800 you fix your position 044°T, 0.8 nm from Gannet Rock daybeacon. You steer 130°T at 4.1 kn until 0845, then 266°T at 4.2 kn until 0920.

   Give the 0920 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  

6. At 1430 you fix your position 039°T, 3.3 nm from Westfield church spire. You steer 202°T at 7.4 kn until 1450, then 160°T at 8.8 kn until 1505.

   Give the 1505 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  

7. At 0925 you fix your position 020°T, 2.8 nm from Westfield church spire. You steer 084°T at 4.6 kn until 0940, then 174°T at 9.6 kn until 1010.

   Give the 1010 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  

8. At 0745 you fix your position 020°T, 1.3 nm from Heron Point Light. You steer 060°T at 6.4 kn until 0810, then 119°T at 8.1 kn until 0830.

   Give the 0830 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