Device for precaution skyjacking and system

Abstract

This airliner hijacking prevention system solution is the most sophisticated solution available today. The solution consists of the following three complementary, indispensable parts: 1. The double-door “single person checkroom”, the only passage to the cockpit. In this closed one-person-only checkroom a series of checks are made before access is gained to the cockpit. 2. Closed circuit television and communication system, hidden, free from the control of the aircrew, and with independent power supply. This system keeps informed of what is going on in the cabin. 3. A hidden flight locus monitor free from the control of the aircrew and with independent power supply also transfers messages between the airliner and the ground monitoring center through a relay satellite or special frequency band.

Dependencies are inferred from the claim text.