Worksheet 321 · Skill 3

Dead reckoning

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1. At 1055 you fix your position 283°T, 1.8 nm from Gannet Rock daybeacon. You steer 313°T at 6.7 kn until 1140, then 188°T at 5.7 kn until 1225.

   Give the 1225 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  

2. At 1225 you fix your position 041°T, 3.6 nm from Gannet Rock daybeacon. You steer 042°T at 6.0 kn until 1235, then 215°T at 8.8 kn until 1310.

   Give the 1310 DR position as the true bearing FROM Kittle water tank 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 Kittle water tank: ________ °T   Distance: ________ nm  

3. At 0730 you fix your position 053°T, 2.9 nm from Westfield church spire. You steer 126°T at 5.8 kn until 0805, then 298°T at 6.2 kn until 0840.

   Give the 0840 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 1555 you fix your position 143°T, 1.9 nm from Westfield church spire. You steer 045°T at 5.8 kn until 1610, then 012°T at 5.4 kn until 1645.

   Give the 1645 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 1135 you fix your position 079°T, 1.8 nm from Gannet Rock daybeacon. You steer 141°T at 4.4 kn until 1145, then 179°T at 6.1 kn until 1155.

   Give the 1155 DR position as the true bearing FROM Kittle water tank 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 Kittle water tank: ________ °T   Distance: ________ nm  

6. At 1405 you fix your position 010°T, 2.4 nm from Heron Point Light. You steer 012°T at 4.6 kn until 1445, then 281°T at 5.2 kn until 1510.

   Give the 1510 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 0745 you fix your position 083°T, 2.2 nm from Westfield church spire. You steer 055°T at 5.5 kn until 0800, then 259°T at 4.4 kn until 0815.

   Give the 0815 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 1520 you fix your position 227°T, 3.0 nm from Tern Island tower. You steer 152°T at 9.2 kn until 1540, then 313°T at 7.4 kn until 1610.

   Give the 1610 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