Worksheet 300 · Skill 3

Dead reckoning

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1. At 0955 you fix your position 053°T, 2.2 nm from Gannet Rock daybeacon. You steer 146°T at 4.1 kn until 1005, then 225°T at 6.5 kn until 1030.

   Give the 1030 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 0820 you fix your position 061°T, 2.9 nm from Heron Point Light. You steer 060°T at 4.9 kn until 0855, then 323°T at 6.9 kn until 0925.

   Give the 0925 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 1430 you fix your position 246°T, 2.9 nm from Tern Island tower. You steer 200°T at 9.0 kn until 1440, then 276°T at 8.8 kn until 1505.

   Give the 1505 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  

4. At 1225 you fix your position 042°T, 2.2 nm from Heron Point Light. You steer 058°T at 5.3 kn until 1255, then 296°T at 7.8 kn until 1315.

   Give the 1315 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  

5. At 1030 you fix your position 040°T, 2.4 nm from Gannet Rock daybeacon. You steer 005°T at 8.5 kn until 1040, then 335°T at 8.1 kn until 1050.

   Give the 1050 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 1315 you fix your position 263°T, 2.2 nm from Tern Island tower. You steer 300°T at 8.2 kn until 1330, then 066°T at 7.5 kn until 1400.

   Give the 1400 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 1425 you fix your position 033°T, 2.0 nm from Westfield church spire. You steer 107°T at 7.4 kn until 1510, then 254°T at 5.0 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  

8. At 1415 you fix your position 004°T, 2.0 nm from Mill stack. You steer 056°T at 6.3 kn until 1450, then 275°T at 5.6 kn until 1500.

   Give the 1500 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