Nothing to do with security. There is no approved IAP for NAF Base, Port Harcourt. It has no navaids. There is an NDB but it has only worked intermittently for the last year and is currently unserviceable. The procedure for a VFR arrival for fixed wing is based on arrival overhead the POT VOR, let down on a radial from that, then right turn to line up for a VMC approach to runway 22.