Worksheet 384 · Skill 3

Dead reckoning

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1. At 1445 you fix your position 140°T, 3.7 nm from Westfield church spire. You steer 325°T at 4.1 kn until 1505, then 084°T at 7.0 kn until 1525.

   Give the 1525 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 1205 you fix your position 035°T, 3.3 nm from Heron Point Light. You steer 341°T at 9.4 kn until 1225, then 290°T at 9.1 kn until 1240.

   Give the 1240 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  

3. At 1415 you fix your position 097°T, 2.1 nm from Tern Island tower. You steer 131°T at 4.2 kn until 1430, then 350°T at 4.9 kn until 1500.

   Give the 1500 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 1540 you fix your position 027°T, 2.6 nm from Gannet Rock daybeacon. You steer 183°T at 9.4 kn until 1550, then 141°T at 5.6 kn until 1615.

   Give the 1615 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  

5. At 1155 you fix your position 056°T, 1.8 nm from Heron Point Light. You steer 309°T at 4.7 kn until 1235, then 012°T at 6.5 kn until 1305.

   Give the 1305 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 1050 you fix your position 273°T, 3.0 nm from Tern Island tower. You steer 207°T at 9.1 kn until 1115, then 155°T at 5.1 kn until 1130.

   Give the 1130 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  

7. At 0935 you fix your position 038°T, 3.7 nm from Westfield church spire. You steer 200°T at 9.1 kn until 0955, then 105°T at 8.9 kn until 1025.

   Give the 1025 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 1410 you fix your position 007°T, 2.5 nm from Mill stack. You steer 055°T at 6.2 kn until 1425, then 286°T at 8.4 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