Worksheet 245 · 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 1555 you fix your position 031°T, 1.2 nm from Westfield church spire. You steer 089°T at 5.4 kn until 1620, then 248°T at 6.4 kn until 1640.

   Give the 1640 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 0900 you fix your position 064°T, 2.3 nm from Westfield church spire. You steer 158°T at 7.3 kn until 0940, then 312°T at 9.8 kn until 0955.

   Give the 0955 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  

3. At 1225 you fix your position 023°T, 1.1 nm from Westfield church spire. You steer 095°T at 9.3 kn until 1250, then 146°T at 8.0 kn until 1325.

   Give the 1325 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  

4. At 1140 you fix your position 302°T, 2.7 nm from Tern Island tower. You steer 158°T at 5.4 kn until 1210, then 348°T at 5.8 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  

5. At 1115 you fix your position 019°T, 2.0 nm from Mill stack. You steer 079°T at 5.6 kn until 1125, then 280°T at 5.0 kn until 1205.

   Give the 1205 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 1130 you fix your position 076°T, 2.1 nm from Heron Point Light. You steer 029°T at 8.6 kn until 1145, then 305°T at 5.5 kn until 1155.

   Give the 1155 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 1250 you fix your position 024°T, 3.0 nm from Heron Point Light. You steer 149°T at 4.7 kn until 1320, then 109°T at 9.0 kn until 1340.

   Give the 1340 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  

8. At 0930 you fix your position 281°T, 3.1 nm from Tern Island tower. You steer 343°T at 8.1 kn until 0940, then 126°T at 5.5 kn until 1000.

   Give the 1000 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