Worksheet 82 · Skill 3

Dead reckoning

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1. At 1155 you fix your position 269°T, 2.0 nm from Gannet Rock daybeacon. You steer 117°T at 5.7 kn until 1220, then 033°T at 9.5 kn until 1235.

   Give the 1235 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 1430 you fix your position 057°T, 2.1 nm from Westfield church spire. You steer 339°T at 7.4 kn until 1440, then 152°T at 5.5 kn until 1505.

   Give the 1505 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 0945 you fix your position 046°T, 2.1 nm from Heron Point Light. You steer 046°T at 7.1 kn until 1015, then 166°T at 5.8 kn until 1045.

   Give the 1045 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 1435 you fix your position 004°T, 2.8 nm from Mill stack. You steer 298°T at 9.1 kn until 1500, then 047°T at 8.2 kn until 1535.

   Give the 1535 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 1320 you fix your position 037°T, 2.4 nm from Mill stack. You steer 008°T at 6.2 kn until 1340, then 200°T at 9.2 kn until 1350.

   Give the 1350 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 0855 you fix your position 086°T, 3.6 nm from Westfield church spire. You steer 015°T at 4.2 kn until 0905, then 070°T at 5.9 kn until 0930.

   Give the 0930 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 1530 you fix your position 053°T, 3.7 nm from Westfield church spire. You steer 092°T at 7.6 kn until 1550, then 222°T at 6.2 kn until 1630.

   Give the 1630 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 1200 you fix your position 081°T, 2.8 nm from Tern Island tower. You steer 279°T at 9.2 kn until 1210, then 162°T at 5.6 kn until 1240.

   Give the 1240 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