Worksheet 282 · 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 1140 you fix your position 093°T, 2.0 nm from Heron Point Light. You steer 348°T at 8.6 kn until 1200, then 090°T at 8.9 kn until 1245.

   Give the 1245 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 0945 you fix your position 345°T, 1.7 nm from Mill stack. You steer 307°T at 9.7 kn until 1000, then 134°T at 5.8 kn until 1010.

   Give the 1010 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 1100 you fix your position 105°T, 1.8 nm from Tern Island tower. You steer 067°T at 4.8 kn until 1115, then 181°T at 8.9 kn until 1140.

   Give the 1140 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 0925 you fix your position 050°T, 3.4 nm from Heron Point Light. You steer 261°T at 9.8 kn until 0945, then 084°T at 5.7 kn until 1005.

   Give the 1005 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 1325 you fix your position 116°T, 1.2 nm from Gannet Rock daybeacon. You steer 336°T at 4.0 kn until 1340, then 090°T at 9.2 kn until 1350.

   Give the 1350 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  

6. At 1105 you fix your position 210°T, 3.0 nm from Tern Island tower. You steer 154°T at 4.1 kn until 1145, then 031°T at 4.4 kn until 1230.

   Give the 1230 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 0750 you fix your position 053°T, 3.8 nm from Westfield church spire. You steer 178°T at 8.0 kn until 0805, then 247°T at 6.8 kn until 0815.

   Give the 0815 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  

8. At 0935 you fix your position 008°T, 2.1 nm from Tern Island tower. You steer 118°T at 4.4 kn until 1010, then 337°T at 4.3 kn until 1030.

   Give the 1030 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