OK...What are the scenarios of diverting to Calabar Airport?
Is the terrain a problem??
Is the airport in controlled airspace?
Would they be searching at night (surely they would have access to "infa-red" camera's ???)
I also find it very hard to believe that this aircraft hasn't been found, or at least the fact that the "Emergency Locator Beacon" failed to work.
What was the weather like on the day of the flight??