Worksheet 699 · Skill 3

Dead reckoning

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1. At 1020 you fix your position 097°T, 3.2 nm from Westfield church spire. You steer 209°T at 5.3 kn until 1030, then 177°T at 5.5 kn until 1045.

   Give the 1045 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  

2. At 1425 you fix your position 023°T, 1.6 nm from Tern Island tower. You steer 112°T at 8.7 kn until 1435, then 059°T at 5.4 kn until 1445.

   Give the 1445 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 0955 you fix your position 015°T, 2.3 nm from Heron Point Light. You steer 029°T at 8.7 kn until 1030, then 211°T at 4.9 kn until 1040.

   Give the 1040 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  

4. At 1210 you fix your position 089°T, 2.2 nm from Tern Island tower. You steer 037°T at 9.2 kn until 1220, then 181°T at 5.6 kn until 1245.

   Give the 1245 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  

5. At 0800 you fix your position 200°T, 2.3 nm from Tern Island tower. You steer 254°T at 7.3 kn until 0830, then 105°T at 7.5 kn until 0900.

   Give the 0900 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 0910 you fix your position 088°T, 3.2 nm from Westfield church spire. You steer 126°T at 6.7 kn until 0925, then 311°T at 5.8 kn until 1010.

   Give the 1010 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  

7. At 0700 you fix your position 071°T, 2.3 nm from Gannet Rock daybeacon. You steer 177°T at 6.6 kn until 0725, then 308°T at 5.2 kn until 0745.

   Give the 0745 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 1030 you fix your position 032°T, 2.8 nm from Gannet Rock daybeacon. You steer 150°T at 4.1 kn until 1105, then 261°T at 5.3 kn until 1130.

   Give the 1130 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