1.   Each of the maneuvers is intended to remove navigational errors.

2.   For the Navy, Meridian analyzes secret data on nuclear submarines to remove navigational errors, allowing officers back on land to better understand actual routes.

3.   The accident, due to a navigational error on the part of the bridge watch, occurred well after midnight when Capt. G.B. McEwen was off watch and asleep.

4.   The space agency vowed to pinpoint the cause of the navigational error.

5.   Authorities blamed navigational error.

6.   Clinton and administration officials avoided threatening retaliation, even while insisting the helicopter strayed into North Korean territory because of navigational errors.

7.   David Gutierrez of the Quintana Roo state office of the Environment Secretariat said navigational error was the likely cause.

8.   Local authorities blamed navigational error.

9.   North Korea freed him after the U.S. government expressed regret for what it called a navigational error -- not a spy mission as claimed by the North.

10.   The crew members make a navigational error or descend too low, or both, so that the aircraft hits the ground without the crew realizing the danger.