Worksheet 264 · Skill 3

Dead reckoning

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1. At 1550 you fix your position 051°T, 2.4 nm from Mill stack. You steer 049°T at 5.1 kn until 1625, then 119°T at 7.3 kn until 1635.

   Give the 1635 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 0925 you fix your position 063°T, 3.9 nm from Tern Island tower. You steer 188°T at 6.7 kn until 1010, then 242°T at 7.0 kn until 1040.

   Give the 1040 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 1045 you fix your position 069°T, 0.9 nm from Gannet Rock daybeacon. You steer 206°T at 7.8 kn until 1100, then 279°T at 9.6 kn until 1120.

   Give the 1120 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  

4. At 1425 you fix your position 328°T, 1.8 nm from Heron Point Light. You steer 127°T at 5.1 kn until 1505, then 011°T at 9.2 kn until 1550.

   Give the 1550 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 0800 you fix your position 201°T, 0.9 nm from Gannet Rock daybeacon. You steer 238°T at 8.2 kn until 0815, then 295°T at 4.8 kn until 0840.

   Give the 0840 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  

6. At 0740 you fix your position 194°T, 2.0 nm from Gannet Rock daybeacon. You steer 359°T at 4.4 kn until 0805, then 184°T at 4.1 kn until 0840.

   Give the 0840 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  

7. At 1215 you fix your position 357°T, 2.1 nm from Mill stack. You steer 280°T at 6.6 kn until 1230, then 031°T at 4.0 kn until 1245.

   Give the 1245 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 1155 you fix your position 252°T, 2.9 nm from Tern Island tower. You steer 139°T at 6.3 kn until 1220, then 073°T at 7.3 kn until 1250.

   Give the 1250 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