Worksheet 303 · 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 0815 you fix your position 054°T, 2.7 nm from Heron Point Light. You steer 099°T at 8.0 kn until 0830, then 295°T at 4.3 kn until 0840.

   Give the 0840 DR position as the true bearing FROM Mill stack 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 Mill stack: ________ °T   Distance: ________ nm  

2. At 1435 you fix your position 037°T, 3.7 nm from Westfield church spire. You steer 129°T at 8.0 kn until 1500, then 343°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  

3. At 1325 you fix your position 050°T, 1.6 nm from Tern Island tower. You steer 351°T at 6.0 kn until 1335, then 261°T at 6.5 kn until 1410.

   Give the 1410 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  

4. At 1420 you fix your position 030°T, 2.5 nm from Tern Island tower. You steer 256°T at 9.9 kn until 1435, then 012°T at 5.3 kn until 1445.

   Give the 1445 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 1320 you fix your position 255°T, 2.7 nm from Tern Island tower. You steer 172°T at 6.3 kn until 1335, then 036°T at 9.5 kn until 1345.

   Give the 1345 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 0740 you fix your position 046°T, 1.9 nm from Tern Island tower. You steer 152°T at 9.3 kn until 0805, then 294°T at 4.0 kn until 0845.

   Give the 0845 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 1055 you fix your position 066°T, 1.3 nm from Heron Point Light. You steer 001°T at 6.9 kn until 1125, then 213°T at 7.4 kn until 1135.

   Give the 1135 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 0700 you fix your position 259°T, 2.7 nm from Tern Island tower. You steer 195°T at 4.4 kn until 0710, then 330°T at 9.0 kn until 0725.

   Give the 0725 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