Worksheet 326 · Skill 3

Dead reckoning

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1. At 1445 you fix your position 238°T, 3.0 nm from Tern Island tower. You steer 059°T at 5.7 kn until 1455, then 323°T at 6.8 kn until 1535.

   Give the 1535 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 1540 you fix your position 359°T, 0.8 nm from Gannet Rock daybeacon. You steer 262°T at 4.5 kn until 1620, then 059°T at 7.7 kn until 1635.

   Give the 1635 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  

3. At 1035 you fix your position 062°T, 4.9 nm from Tern Island tower. You steer 235°T at 9.0 kn until 1055, then 151°T at 8.3 kn until 1125.

   Give the 1125 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 1250 you fix your position 039°T, 4.6 nm from Westfield church spire. You steer 191°T at 4.8 kn until 1330, then 157°T at 8.5 kn until 1340.

   Give the 1340 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 1240 you fix your position 009°T, 1.7 nm from Westfield church spire. You steer 110°T at 5.6 kn until 1310, then 353°T at 4.9 kn until 1325.

   Give the 1325 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  

6. At 1230 you fix your position 192°T, 1.0 nm from Gannet Rock daybeacon. You steer 099°T at 4.5 kn until 1255, then 059°T at 8.7 kn until 1305.

   Give the 1305 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 1035 you fix your position 025°T, 1.5 nm from Gannet Rock daybeacon. You steer 162°T at 7.8 kn until 1105, then 014°T at 10.0 kn until 1130.

   Give the 1130 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  

8. At 1150 you fix your position 230°T, 1.7 nm from Gannet Rock daybeacon. You steer 259°T at 4.7 kn until 1205, then 018°T at 7.1 kn until 1225.

   Give the 1225 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