Worksheet 487 · 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 1255 you fix your position 055°T, 2.4 nm from Tern Island tower. You steer 264°T at 6.6 kn until 1340, then 298°T at 9.9 kn until 1350.

   Give the 1350 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  

2. At 0815 you fix your position 204°T, 1.7 nm from Gannet Rock daybeacon. You steer 069°T at 7.5 kn until 0845, then 010°T at 6.6 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  

3. At 0720 you fix your position 045°T, 3.6 nm from Westfield church spire. You steer 197°T at 4.9 kn until 0745, then 137°T at 9.7 kn until 0755.

   Give the 0755 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  

4. At 1300 you fix your position 033°T, 2.5 nm from Mill stack. You steer 041°T at 8.4 kn until 1345, then 224°T at 5.9 kn until 1420.

   Give the 1420 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  

5. At 1425 you fix your position 057°T, 0.9 nm from Heron Point Light. You steer 034°T at 8.9 kn until 1505, then 208°T at 4.3 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  

6. At 1010 you fix your position 293°T, 3.0 nm from Tern Island tower. You steer 084°T at 8.6 kn until 1040, then 156°T at 8.3 kn until 1125.

   Give the 1125 DR position as the true bearing FROM Kittle water tank 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 Kittle water tank: ________ °T   Distance: ________ nm  

7. At 1415 you fix your position 029°T, 2.7 nm from Westfield church spire. You steer 112°T at 8.5 kn until 1435, then 307°T at 5.5 kn until 1445.

   Give the 1445 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 1115 you fix your position 251°T, 3.7 nm from Tern Island tower. You steer 161°T at 10.0 kn until 1125, then 289°T at 6.6 kn until 1140.

   Give the 1140 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