A pressure-balanced hydraulic coupling suitable for undersea use comprises a male member having one or more flow ports on the side of its probe section and a poppet valve actuator extending from the end of the probe section which has a fluid-tight seal around the actuator. The secret data and administration polices are centrally stored on the LDAP server. The automated inventory tracking system is part of an inventory management system. Each controller receives an independent power supply and is powered on or off according to a GPIO port signal.