Worksheet 603 · Skill 3

Dead reckoning

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1. At 1300 you fix your position 067°T, 2.4 nm from Tern Island tower. You steer 198°T at 8.9 kn until 1335, then 265°T at 5.7 kn until 1410.

   Give the 1410 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  

2. At 0820 you fix your position 305°T, 1.4 nm from Kittle water tank. You steer 088°T at 6.4 kn until 0845, then 357°T at 4.6 kn until 0900.

   Give the 0900 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 1115 you fix your position 311°T, 3.0 nm from Tern Island tower. You steer 112°T at 5.0 kn until 1140, then 276°T at 9.0 kn until 1210.

   Give the 1210 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 1020 you fix your position 267°T, 2.0 nm from Gannet Rock daybeacon. You steer 171°T at 8.0 kn until 1035, then 265°T at 6.9 kn until 1050.

   Give the 1050 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  

5. At 1540 you fix your position 224°T, 3.4 nm from Tern Island tower. You steer 077°T at 5.5 kn until 1610, then 262°T at 5.8 kn until 1645.

   Give the 1645 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 0820 you fix your position 157°T, 1.4 nm from Tern Island tower. You steer 061°T at 5.0 kn until 0835, then 091°T at 6.7 kn until 0905.

   Give the 0905 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  

7. At 1340 you fix your position 111°T, 2.1 nm from Westfield church spire. You steer 076°T at 5.8 kn until 1410, then 204°T at 5.5 kn until 1425.

   Give the 1425 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 0955 you fix your position 053°T, 2.0 nm from Kittle water tank. You steer 264°T at 4.0 kn until 1030, then 005°T at 9.7 kn until 1055.

   Give the 1055 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