Worksheet 696 · Skill 3

Dead reckoning

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1. At 0725 you fix your position 047°T, 3.9 nm from Gannet Rock daybeacon. You steer 220°T at 8.8 kn until 0740, then 025°T at 9.1 kn until 0800.

   Give the 0800 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 1030 you fix your position 049°T, 1.2 nm from Kittle water tank. You steer 002°T at 8.2 kn until 1105, then 167°T at 5.6 kn until 1115.

   Give the 1115 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 1420 you fix your position 061°T, 0.8 nm from Gannet Rock daybeacon. You steer 310°T at 5.3 kn until 1430, then 021°T at 5.3 kn until 1505.

   Give the 1505 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 1525 you fix your position 206°T, 1.6 nm from Tern Island tower. You steer 211°T at 7.9 kn until 1555, then 353°T at 5.2 kn until 1605.

   Give the 1605 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  

5. At 1325 you fix your position 305°T, 3.7 nm from Tern Island tower. You steer 220°T at 7.8 kn until 1350, then 328°T at 4.6 kn until 1410.

   Give the 1410 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  

6. At 0700 you fix your position 082°T, 3.3 nm from Westfield church spire. You steer 134°T at 8.9 kn until 0730, then 083°T at 6.1 kn until 0745.

   Give the 0745 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  

7. At 0935 you fix your position 233°T, 1.3 nm from Tern Island tower. You steer 289°T at 4.3 kn until 0945, then 200°T at 6.3 kn until 1005.

   Give the 1005 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 1130 you fix your position 355°T, 3.3 nm from Mill stack. You steer 144°T at 4.6 kn until 1150, then 014°T at 7.7 kn until 1210.

   Give the 1210 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