Worksheet 272 · Skill 3

Dead reckoning

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1. At 0955 you fix your position 051°T, 2.7 nm from Gannet Rock daybeacon. You steer 016°T at 4.0 kn until 1010, then 235°T at 7.7 kn until 1025.

   Give the 1025 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 1040 you fix your position 316°T, 3.1 nm from Tern Island tower. You steer 275°T at 6.4 kn until 1050, then 230°T at 5.3 kn until 1135.

   Give the 1135 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 1220 you fix your position 304°T, 3.4 nm from Tern Island tower. You steer 201°T at 8.2 kn until 1245, then 252°T at 4.1 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  

4. At 1225 you fix your position 221°T, 3.4 nm from Tern Island tower. You steer 182°T at 7.6 kn until 1235, then 337°T at 4.3 kn until 1250.

   Give the 1250 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  

5. At 1405 you fix your position 104°T, 2.5 nm from Gannet Rock daybeacon. You steer 333°T at 7.8 kn until 1445, then 166°T at 6.4 kn until 1530.

   Give the 1530 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 1235 you fix your position 186°T, 1.5 nm from Gannet Rock daybeacon. You steer 047°T at 5.3 kn until 1300, then 138°T at 9.1 kn until 1310.

   Give the 1310 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 1440 you fix your position 266°T, 1.7 nm from Gannet Rock daybeacon. You steer 332°T at 5.0 kn until 1505, then 271°T at 5.2 kn until 1525.

   Give the 1525 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 0935 you fix your position 046°T, 4.4 nm from Westfield church spire. You steer 156°T at 5.1 kn until 1000, then 292°T at 4.1 kn until 1035.

   Give the 1035 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