Worksheet 714 · 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 0900 you fix your position 227°T, 3.0 nm from Tern Island tower. You steer 258°T at 5.5 kn until 0910, then 132°T at 6.9 kn until 0945.

   Give the 0945 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  

2. At 1115 you fix your position 074°T, 3.3 nm from Westfield church spire. You steer 238°T at 7.3 kn until 1140, then 109°T at 5.4 kn until 1200.

   Give the 1200 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 1505 you fix your position 056°T, 3.2 nm from Westfield church spire. You steer 356°T at 4.1 kn until 1520, then 085°T at 8.4 kn until 1545.

   Give the 1545 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 1600 you fix your position 044°T, 1.4 nm from Westfield church spire. You steer 148°T at 5.0 kn until 1630, then 024°T at 9.5 kn until 1650.

   Give the 1650 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 1235 you fix your position 334°T, 1.5 nm from Heron Point Light. You steer 014°T at 6.7 kn until 1255, then 306°T at 5.5 kn until 1320.

   Give the 1320 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 1520 you fix your position 013°T, 1.9 nm from Gannet Rock daybeacon. You steer 079°T at 8.5 kn until 1530, then 181°T at 7.9 kn until 1550.

   Give the 1550 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  

7. At 1430 you fix your position 316°T, 2.0 nm from Tern Island tower. You steer 216°T at 5.1 kn until 1505, then 043°T at 4.5 kn until 1525.

   Give the 1525 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 1235 you fix your position 033°T, 3.4 nm from Westfield church spire. You steer 168°T at 8.2 kn until 1245, then 210°T at 4.6 kn until 1255.

   Give the 1255 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