Worksheet 369 · 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 0700 you fix your position 238°T, 0.8 nm from Gannet Rock daybeacon. You steer 158°T at 5.0 kn until 0710, then 315°T at 7.1 kn until 0750.

   Give the 0750 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 1345 you fix your position 244°T, 2.6 nm from Tern Island tower. You steer 357°T at 9.1 kn until 1400, then 192°T at 9.9 kn until 1410.

   Give the 1410 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 1500 you fix your position 185°T, 1.3 nm from Gannet Rock daybeacon. You steer 206°T at 6.9 kn until 1510, then 000°T at 4.5 kn until 1555.

   Give the 1555 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 0800 you fix your position 035°T, 1.3 nm from Kittle water tank. You steer 049°T at 5.1 kn until 0810, then 336°T at 7.7 kn until 0845.

   Give the 0845 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 1400 you fix your position 034°T, 1.6 nm from Gannet Rock daybeacon. You steer 085°T at 4.1 kn until 1415, then 024°T at 4.2 kn until 1425.

   Give the 1425 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 1410 you fix your position 025°T, 3.1 nm from Gannet Rock daybeacon. You steer 169°T at 9.8 kn until 1440, then 302°T at 4.5 kn until 1455.

   Give the 1455 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 0935 you fix your position 036°T, 4.7 nm from Gannet Rock daybeacon. You steer 192°T at 7.1 kn until 1020, then 262°T at 9.1 kn until 1105.

   Give the 1105 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  

8. At 0745 you fix your position 276°T, 1.4 nm from Gannet Rock daybeacon. You steer 289°T at 7.9 kn until 0830, then 356°T at 5.2 kn until 0845.

   Give the 0845 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