Worksheet 196 · Skill 3

Dead reckoning

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1. At 1410 you fix your position 050°T, 1.1 nm from Gannet Rock daybeacon. You steer 185°T at 5.5 kn until 1440, then 015°T at 4.7 kn until 1450.

   Give the 1450 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 0855 you fix your position 082°T, 2.2 nm from Westfield church spire. You steer 072°T at 5.9 kn until 0905, then 129°T at 8.2 kn until 0915.

   Give the 0915 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 1255 you fix your position 277°T, 2.6 nm from Tern Island tower. You steer 103°T at 7.6 kn until 1305, then 175°T at 8.1 kn until 1335.

   Give the 1335 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 1310 you fix your position 070°T, 1.8 nm from Heron Point Light. You steer 070°T at 4.1 kn until 1330, then 297°T at 6.3 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  

5. At 1430 you fix your position 265°T, 2.5 nm from Tern Island tower. You steer 269°T at 7.9 kn until 1505, then 069°T at 6.0 kn until 1515.

   Give the 1515 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 1530 you fix your position 013°T, 2.3 nm from Tern Island tower. You steer 271°T at 4.3 kn until 1545, then 126°T at 5.0 kn until 1625.

   Give the 1625 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 1545 you fix your position 283°T, 1.7 nm from Gannet Rock daybeacon. You steer 319°T at 7.3 kn until 1615, then 169°T at 9.5 kn until 1650.

   Give the 1650 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  

8. At 1115 you fix your position 352°T, 2.1 nm from Mill stack. You steer 009°T at 5.3 kn until 1155, then 274°T at 8.1 kn until 1220.

   Give the 1220 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