Worksheet 693 · Skill 3

Dead reckoning

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1. At 1310 you fix your position 110°T, 1.1 nm from Gannet Rock daybeacon. You steer 233°T at 5.2 kn until 1345, then 329°T at 5.4 kn until 1355.

   Give the 1355 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 1400 you fix your position 356°T, 1.8 nm from Gannet Rock daybeacon. You steer 015°T at 9.8 kn until 1420, then 092°T at 7.9 kn until 1430.

   Give the 1430 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 1130 you fix your position 211°T, 3.3 nm from Tern Island tower. You steer 310°T at 6.7 kn until 1205, then 045°T at 9.3 kn until 1225.

   Give the 1225 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 1515 you fix your position 037°T, 2.3 nm from Westfield church spire. You steer 167°T at 5.8 kn until 1540, then 109°T at 9.8 kn until 1625.

   Give the 1625 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 1530 you fix your position 033°T, 1.7 nm from Gannet Rock daybeacon. You steer 093°T at 5.6 kn until 1550, then 227°T at 7.7 kn until 1630.

   Give the 1630 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  

6. At 1050 you fix your position 008°T, 3.3 nm from Westfield church spire. You steer 199°T at 4.0 kn until 1115, then 109°T at 8.0 kn until 1130.

   Give the 1130 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  

7. At 0955 you fix your position 039°T, 1.3 nm from Westfield church spire. You steer 109°T at 9.9 kn until 1020, then 303°T at 8.1 kn until 1035.

   Give the 1035 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 1140 you fix your position 059°T, 2.9 nm from Heron Point Light. You steer 348°T at 6.2 kn until 1220, then 160°T at 8.2 kn until 1255.

   Give the 1255 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