Worksheet 667 · Skill 3

Dead reckoning

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1. At 1155 you fix your position 290°T, 1.8 nm from Gannet Rock daybeacon. You steer 055°T at 9.9 kn until 1220, then 352°T at 8.4 kn until 1235.

   Give the 1235 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  

2. At 1325 you fix your position 189°T, 1.3 nm from Tern Island tower. You steer 132°T at 7.0 kn until 1335, then 206°T at 5.0 kn until 1400.

   Give the 1400 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  

3. At 1530 you fix your position 011°T, 2.9 nm from Mill stack. You steer 194°T at 6.0 kn until 1540, then 090°T at 8.2 kn until 1615.

   Give the 1615 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  

4. At 0905 you fix your position 052°T, 3.1 nm from Tern Island tower. You steer 167°T at 5.5 kn until 0920, then 211°T at 4.1 kn until 1005.

   Give the 1005 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 1040 you fix your position 047°T, 3.7 nm from Westfield church spire. You steer 176°T at 8.4 kn until 1100, then 264°T at 4.2 kn until 1125.

   Give the 1125 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 1005 you fix your position 030°T, 2.4 nm from Gannet Rock daybeacon. You steer 176°T at 6.5 kn until 1030, then 016°T at 7.6 kn until 1055.

   Give the 1055 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  

7. At 1315 you fix your position 121°T, 1.1 nm from Gannet Rock daybeacon. You steer 027°T at 4.6 kn until 1330, then 280°T at 5.3 kn until 1405.

   Give the 1405 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 1205 you fix your position 285°T, 2.4 nm from Tern Island tower. You steer 281°T at 5.8 kn until 1220, then 179°T at 7.0 kn until 1255.

   Give the 1255 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