Worksheet 649 · 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 1505 you fix your position 289°T, 1.5 nm from Tern Island tower. You steer 296°T at 8.1 kn until 1520, then 202°T at 7.0 kn until 1550.

   Give the 1550 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  

2. At 1245 you fix your position 358°T, 2.0 nm from Heron Point Light. You steer 040°T at 4.3 kn until 1315, then 121°T at 6.3 kn until 1355.

   Give the 1355 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 0830 you fix your position 292°T, 1.7 nm from Gannet Rock daybeacon. You steer 231°T at 4.5 kn until 0840, then 051°T at 4.4 kn until 0910.

   Give the 0910 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  

4. At 1020 you fix your position 011°T, 1.3 nm from Westfield church spire. You steer 010°T at 5.8 kn until 1035, then 147°T at 9.5 kn until 1115.

   Give the 1115 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  

5. At 1010 you fix your position 031°T, 3.0 nm from Heron Point Light. You steer 205°T at 4.1 kn until 1020, then 350°T at 4.3 kn until 1035.

   Give the 1035 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 1225 you fix your position 081°T, 2.7 nm from Gannet Rock daybeacon. You steer 185°T at 7.2 kn until 1245, then 339°T at 7.0 kn until 1305.

   Give the 1305 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 061°T, 2.5 nm from Westfield church spire. You steer 052°T at 6.4 kn until 1500, then 172°T at 4.2 kn until 1530.

   Give the 1530 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 0825 you fix your position 277°T, 1.8 nm from Gannet Rock daybeacon. You steer 313°T at 8.7 kn until 0855, then 200°T at 6.9 kn until 0920.

   Give the 0920 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