Worksheet 199 · Skill 3

Dead reckoning

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1. At 1110 you fix your position 051°T, 3.3 nm from Heron Point Light. You steer 109°T at 5.6 kn until 1145, then 182°T at 4.0 kn until 1200.

   Give the 1200 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 0805 you fix your position 044°T, 2.1 nm from Kittle water tank. You steer 334°T at 8.0 kn until 0830, then 136°T at 6.2 kn until 0845.

   Give the 0845 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  

3. At 0710 you fix your position 358°T, 2.6 nm from Mill stack. You steer 012°T at 4.1 kn until 0725, then 092°T at 8.7 kn until 0740.

   Give the 0740 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  

4. At 1030 you fix your position 055°T, 3.3 nm from Heron Point Light. You steer 048°T at 8.0 kn until 1045, then 094°T at 4.7 kn until 1120.

   Give the 1120 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 1405 you fix your position 163°T, 1.6 nm from Tern Island tower. You steer 244°T at 7.2 kn until 1420, then 129°T at 5.3 kn until 1455.

   Give the 1455 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 1230 you fix your position 163°T, 1.5 nm from Gannet Rock daybeacon. You steer 281°T at 6.2 kn until 1250, then 034°T at 8.9 kn until 1330.

   Give the 1330 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 0800 you fix your position 354°T, 2.8 nm from Mill stack. You steer 151°T at 9.0 kn until 0815, then 297°T at 7.1 kn until 0845.

   Give the 0845 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  

8. At 1125 you fix your position 187°T, 1.7 nm from Tern Island tower. You steer 274°T at 4.3 kn until 1155, then 196°T at 5.5 kn until 1235.

   Give the 1235 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