Worksheet 608 · 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 075°T, 2.9 nm from Tern Island tower. You steer 187°T at 5.8 kn until 1225, then 022°T at 5.3 kn until 1235.

   Give the 1235 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  

2. At 0755 you fix your position 040°T, 2.9 nm from Heron Point Light. You steer 171°T at 6.3 kn until 0820, then 077°T at 9.7 kn until 0905.

   Give the 0905 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 1500 you fix your position 065°T, 2.3 nm from Heron Point Light. You steer 228°T at 9.0 kn until 1510, then 351°T at 7.1 kn until 1540.

   Give the 1540 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 0750 you fix your position 040°T, 1.5 nm from Westfield church spire. You steer 117°T at 8.1 kn until 0830, then 152°T at 9.2 kn until 0845.

   Give the 0845 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  

5. At 1215 you fix your position 257°T, 2.1 nm from Gannet Rock daybeacon. You steer 261°T at 7.0 kn until 1245, then 108°T at 4.0 kn until 1320.

   Give the 1320 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  

6. At 1220 you fix your position 100°T, 2.8 nm from Westfield church spire. You steer 085°T at 9.5 kn until 1255, then 230°T at 7.3 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  

7. At 1245 you fix your position 046°T, 1.7 nm from Westfield church spire. You steer 161°T at 5.2 kn until 1330, then 074°T at 8.0 kn until 1355.

   Give the 1355 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 0835 you fix your position 064°T, 3.6 nm from Westfield church spire. You steer 272°T at 8.5 kn until 0855, then 141°T at 5.0 kn until 0925.

   Give the 0925 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