Let me put my two cents worth.
first thing is the why Navy had only one sentry on the gate and he was diverted by this blast and he runs to get help and that allowed terrorists to enter. Why did Navy did not have several sentries on gate on duty.
Why did navy not cover these planes with a wall of steel plates operated to open and close by power supplied to them with hydraulic systems.
Why did navy had to wait for day light, in a sensitive such as this, their should be power lights running by generators to see the surroundings for attackers. Why their were no trip wires installed around the perimeter to get warning from an area just outside the perimeter to sound alarms if some one is trying to infiltrate the base.
Why their were not more than one teams tackling instead of one trying to many tasks at one time, their is a failure of command when only one team is applied for so many place to cover.
These are but few things come to mind let us see what Our subedar has to say about this. I am submitting this with great respect for him to sacrifice his son but we need to save his son by the measures that are easy to take and only can be implemented if commander is brilliant, smart and can visulise the future situations and plans ahead.