Two kinds of on-board antimissile systems are now available.

The on-board systems in both the trials worked satisfactorily and had met the mission objectives.

Messages are sent to the ground from other on-board systems in a manner similar to the delay message example discussed above.

Russian officials have defended that decision, but Western experts say pilots should always obey the on-board system.

But without power from on-board systems, or a capacitor, it would not be able to record much of anything.

I'm restricted to on-board systems while maintaining full defensive fields, and I have no data at all on it.

The flight with passengers suffered the failure of 22 to 24 on-board systems.

But airline experts have been questioning whether on-board systems are adequate.

The ship's trajectory was computer-controlled, as were most of its on-board systems.

The lights began appearing on dashboards in 1978, as part of on-board diagnostic systems.