Final answer:
The only type of firing mechanism currently used in aircraft mines is the electromagnetic mechanism.
Step-by-step explanation:
In aircraft mines, the only type of firing mechanism currently used is the electromagnetic mechanism. This firing mechanism relies on the principle of electromagnetic induction to initiate the explosion. It consists of a coil of wire that generates a magnetic field when an electric current passes through it. When the mine comes into contact with a target, the magnetic field is disturbed, causing the coil to generate an electric pulse that detonates the mine.