Worksheet 393 · 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 1350 you fix your position 089°T, 2.4 nm from Gannet Rock daybeacon. You steer 183°T at 4.1 kn until 1425, then 339°T at 8.8 kn until 1435.

   Give the 1435 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 0705 you fix your position 090°T, 2.9 nm from Westfield church spire. You steer 101°T at 9.4 kn until 0720, then 155°T at 5.3 kn until 0745.

   Give the 0745 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  

3. At 1205 you fix your position 265°T, 2.4 nm from Gannet Rock daybeacon. You steer 042°T at 5.6 kn until 1245, then 223°T at 8.6 kn until 1325.

   Give the 1325 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  

4. At 1100 you fix your position 017°T, 1.6 nm from Heron Point Light. You steer 018°T at 9.3 kn until 1115, then 069°T at 4.0 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 1340 you fix your position 107°T, 0.9 nm from Gannet Rock daybeacon. You steer 059°T at 4.3 kn until 1410, then 192°T at 9.0 kn until 1425.

   Give the 1425 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  

6. At 1045 you fix your position 010°T, 2.9 nm from Mill stack. You steer 248°T at 4.5 kn until 1055, then 333°T at 8.2 kn until 1110.

   Give the 1110 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 0950 you fix your position 081°T, 1.2 nm from Gannet Rock daybeacon. You steer 203°T at 4.4 kn until 1020, then 012°T at 8.2 kn until 1105.

   Give the 1105 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 1545 you fix your position 018°T, 1.6 nm from Westfield church spire. You steer 145°T at 6.1 kn until 1625, then 306°T at 5.5 kn until 1645.

   Give the 1645 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