Worksheet 214 · 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 1030 you fix your position 009°T, 2.0 nm from Mill stack. You steer 296°T at 7.1 kn until 1045, then 105°T at 9.5 kn until 1105.

   Give the 1105 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 0820 you fix your position 096°T, 1.7 nm from Gannet Rock daybeacon. You steer 358°T at 9.5 kn until 0845, then 301°T at 7.5 kn until 0900.

   Give the 0900 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  

3. At 1055 you fix your position 027°T, 3.0 nm from Gannet Rock daybeacon. You steer 004°T at 4.3 kn until 1110, then 129°T at 8.6 kn until 1125.

   Give the 1125 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 0845 you fix your position 057°T, 2.4 nm from Gannet Rock daybeacon. You steer 240°T at 4.0 kn until 0900, then 279°T at 8.7 kn until 0930.

   Give the 0930 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 1440 you fix your position 063°T, 1.4 nm from Tern Island tower. You steer 109°T at 8.3 kn until 1500, then 319°T at 4.1 kn until 1510.

   Give the 1510 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 1555 you fix your position 291°T, 2.8 nm from Tern Island tower. You steer 151°T at 9.9 kn until 1610, then 343°T at 5.3 kn until 1645.

   Give the 1645 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 1230 you fix your position 028°T, 3.1 nm from Gannet Rock daybeacon. You steer 208°T at 4.0 kn until 1240, then 048°T at 6.2 kn until 1250.

   Give the 1250 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  

8. At 1215 you fix your position 105°T, 2.3 nm from Westfield church spire. You steer 234°T at 8.5 kn until 1225, then 109°T at 5.9 kn until 1300.

   Give the 1300 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