Abstract: A multi-purpose hatch system having a removable antenna mounting plug, block or plate for installing multiple configurations of antennas or sensors is disclosed. The system features a hatch having an opening sized to receive the antenna mounting plug, block or plate. The hatch features handles which aid in installation and removal of the hatch. Multiple configurations of antennas or sensors attached to the plate can easily be removed and quickly installed to configure an aircraft for a specific mission. The system also features a billet machined hatch body, field replaceable seals and easily adaptable antenna or sensor mounting configurations which provide unprecedented ruggedness, antenna options, and field supportability.