Worksheet 213 · Skill 3

Dead reckoning

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1. At 1410 you fix your position 028°T, 2.3 nm from Westfield church spire. You steer 171°T at 10.0 kn until 1420, then 135°T at 4.0 kn until 1430.

   Give the 1430 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  

2. At 1350 you fix your position 036°T, 4.0 nm from Westfield church spire. You steer 173°T at 7.7 kn until 1435, then 098°T at 5.4 kn until 1515.

   Give the 1515 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  

3. At 1150 you fix your position 291°T, 1.8 nm from Tern Island tower. You steer 272°T at 8.1 kn until 1205, then 184°T at 8.6 kn until 1230.

   Give the 1230 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  

4. At 1035 you fix your position 332°T, 2.7 nm from Kittle water tank. You steer 264°T at 7.3 kn until 1055, then 035°T at 6.8 kn until 1125.

   Give the 1125 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  

5. At 0705 you fix your position 352°T, 1.0 nm from Gannet Rock daybeacon. You steer 217°T at 6.7 kn until 0715, then 268°T at 6.3 kn until 0755.

   Give the 0755 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  

6. At 0900 you fix your position 256°T, 2.8 nm from Tern Island tower. You steer 282°T at 4.3 kn until 0935, then 032°T at 8.1 kn until 0955.

   Give the 0955 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 0850 you fix your position 216°T, 2.4 nm from Tern Island tower. You steer 170°T at 4.6 kn until 0930, then 095°T at 5.8 kn until 0945.

   Give the 0945 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 1455 you fix your position 050°T, 1.5 nm from Kittle water tank. You steer 282°T at 9.1 kn until 1520, then 107°T at 9.7 kn until 1530.

   Give the 1530 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