Worksheet 684 · 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 1155 you fix your position 069°T, 3.6 nm from Westfield church spire. You steer 027°T at 4.5 kn until 1215, then 264°T at 9.6 kn until 1230.

   Give the 1230 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 1520 you fix your position 018°T, 2.3 nm from Mill stack. You steer 097°T at 4.7 kn until 1540, then 277°T at 5.4 kn until 1600.

   Give the 1600 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  

3. At 1350 you fix your position 247°T, 1.8 nm from Gannet Rock daybeacon. You steer 252°T at 5.3 kn until 1435, then 019°T at 8.3 kn until 1450.

   Give the 1450 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 0910 you fix your position 061°T, 2.9 nm from Tern Island tower. You steer 279°T at 9.2 kn until 0920, then 135°T at 6.5 kn until 1005.

   Give the 1005 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 1025 you fix your position 057°T, 3.5 nm from Westfield church spire. You steer 088°T at 4.6 kn until 1050, then 221°T at 6.8 kn until 1110.

   Give the 1110 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 1315 you fix your position 059°T, 2.9 nm from Heron Point Light. You steer 282°T at 8.4 kn until 1340, then 354°T at 5.7 kn until 1350.

   Give the 1350 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 0835 you fix your position 252°T, 1.4 nm from Gannet Rock daybeacon. You steer 263°T at 7.6 kn until 0900, then 344°T at 4.3 kn until 0925.

   Give the 0925 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 0920 you fix your position 043°T, 3.7 nm from Gannet Rock daybeacon. You steer 344°T at 5.4 kn until 0935, then 168°T at 6.1 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