Worksheet 222 · 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 1015 you fix your position 043°T, 3.5 nm from Westfield church spire. You steer 142°T at 8.8 kn until 1050, then 354°T at 4.7 kn until 1100.

   Give the 1100 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  

2. At 1405 you fix your position 027°T, 1.9 nm from Mill stack. You steer 026°T at 4.3 kn until 1445, then 307°T at 9.4 kn until 1500.

   Give the 1500 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 1235 you fix your position 242°T, 1.5 nm from Tern Island tower. You steer 214°T at 7.2 kn until 1255, then 087°T at 7.9 kn until 1320.

   Give the 1320 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 1050 you fix your position 057°T, 2.5 nm from Gannet Rock daybeacon. You steer 308°T at 8.5 kn until 1130, then 131°T at 5.9 kn until 1200.

   Give the 1200 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 1345 you fix your position 273°T, 1.6 nm from Gannet Rock daybeacon. You steer 353°T at 7.1 kn until 1355, then 286°T at 5.6 kn until 1440.

   Give the 1440 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 1030 you fix your position 246°T, 1.7 nm from Tern Island tower. You steer 185°T at 6.0 kn until 1100, then 268°T at 6.8 kn until 1130.

   Give the 1130 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  

7. At 1555 you fix your position 001°T, 1.8 nm from Heron Point Light. You steer 008°T at 8.8 kn until 1620, then 141°T at 5.0 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  

8. At 1520 you fix your position 346°T, 2.4 nm from Mill stack. You steer 157°T at 4.8 kn until 1535, then 036°T at 9.2 kn until 1555.

   Give the 1555 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