Worksheet 443 · Skill 3

Dead reckoning

Print this worksheet Next sheet

Plot Pass worksheet. Plot Pass $1.95/month or $19.50/year · Free during preview. Plotroom · cedarpointmarina.net · invented chart, not for navigation.

1. At 0740 you fix your position 238°T, 2.4 nm from Gannet Rock daybeacon. You steer 064°T at 4.0 kn until 0800, then 097°T at 4.5 kn until 0840.

   Give the 0840 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  

2. At 1055 you fix your position 334°T, 2.2 nm from Tern Island tower. You steer 290°T at 8.1 kn until 1105, then 216°T at 4.8 kn until 1130.

   Give the 1130 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 1300 you fix your position 349°T, 2.6 nm from Mill stack. You steer 135°T at 7.6 kn until 1310, then 048°T at 4.1 kn until 1330.

   Give the 1330 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 0915 you fix your position 325°T, 2.9 nm from Kittle water tank. You steer 091°T at 5.8 kn until 0925, then 285°T at 4.5 kn until 0945.

   Give the 0945 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 0805 you fix your position 061°T, 1.9 nm from Heron Point Light. You steer 339°T at 8.6 kn until 0830, then 113°T at 7.3 kn until 0900.

   Give the 0900 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  

6. At 0830 you fix your position 021°T, 2.0 nm from Heron Point Light. You steer 187°T at 6.5 kn until 0840, then 016°T at 9.1 kn until 0920.

   Give the 0920 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 1445 you fix your position 098°T, 3.1 nm from Westfield church spire. You steer 204°T at 9.9 kn until 1455, then 039°T at 6.9 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 1535 you fix your position 050°T, 2.2 nm from Heron Point Light. You steer 340°T at 4.8 kn until 1545, then 280°T at 4.9 kn until 1615.

   Give the 1615 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