Worksheet 170 · 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 1305 you fix your position 055°T, 2.5 nm from Westfield church spire. You steer 126°T at 8.8 kn until 1330, then 040°T at 4.4 kn until 1340.

   Give the 1340 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 1045 you fix your position 274°T, 1.5 nm from Gannet Rock daybeacon. You steer 218°T at 10.0 kn until 1055, then 305°T at 4.3 kn until 1135.

   Give the 1135 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  

3. At 0925 you fix your position 059°T, 2.0 nm from Heron Point Light. You steer 331°T at 5.3 kn until 0955, then 130°T at 5.6 kn until 1035.

   Give the 1035 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 1010 you fix your position 305°T, 1.0 nm from Gannet Rock daybeacon. You steer 097°T at 4.1 kn until 1045, then 322°T at 4.8 kn until 1110.

   Give the 1110 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 0750 you fix your position 309°T, 1.3 nm from Gannet Rock daybeacon. You steer 295°T at 5.1 kn until 0825, then 207°T at 6.2 kn until 0840.

   Give the 0840 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 1235 you fix your position 337°T, 2.5 nm from Mill stack. You steer 079°T at 8.4 kn until 1300, then 271°T at 9.1 kn until 1325.

   Give the 1325 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  

7. At 0720 you fix your position 014°T, 2.0 nm from Westfield church spire. You steer 142°T at 7.1 kn until 0800, then 066°T at 7.7 kn until 0810.

   Give the 0810 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  

8. At 1425 you fix your position 348°T, 1.5 nm from Kittle water tank. You steer 338°T at 4.4 kn until 1455, then 300°T at 5.7 kn until 1505.

   Give the 1505 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