Summary: Possibility of technical realization of disguise of fire weapons of the field fortification of open type is analysed from an airspionage. It is well-proven that secrecy and limit notability of military equipment can be provided by the artificial forming of surface of obstacle to query facilities as zones of каустики in liquid part of the cylindrical module camouflage to the tunnel. Outlined terms of forming of surface of protecting from a location ray at resonant level of wave coincidence and considerable wave size of shell of the module.

Keywords: wave size, абберация, zone of каустики, wave coincidence.