I am not sure how they would get out of Gaza. They can't fly out, they can't go by sea, they can't walk out unless they sneak through the border wall.. seems if they did that they'd now be in Israel.. not the best place to be.
I
think announcing the plan is giving anyone who can the chance to get away from the area. I suspect as they make public announcements they are watching, gathering intel and seeing how HAMAS reacts to it. They have been bombing targets and have eliminated several of those leaders already. Each time they make a statement of actions they are taking I am sure they are taking quiet action inside Gaza also.
There are several surveillance planes that continue to fly off and on over Israel and the Mediterranean sea. Currently the United Kingdom has a surveillance plane up. Israel had it's signal intelligence plane "IRON" up earlier also and I've seen the US have one in the area in the last few days also.
www.flightradar24.com
RRR7215
IRON
HAMAS has to communicate with each other somehow. I think they have a plan bigger than what they are saying publicly. They make an announcement.. then watch and listen. If HAMAS has to always be ready not knowing exactly when this will happen, I can't imagine they are getting any sleep or not good sleep. Also, if they announce several plans and then delay then will HAMAS think it's going to happen when it actually does? I am sure there is a strategy here. They have some of the most advanced capabilities in the world in the area and they are up against an enemy that can't get supplies in without it being known.. surrounded on all sides I guess you could say.
The attack on them was a surprise. They had no control over that because they didn't pick up intel on it. Since then they have recovered some plans on the bodies of dead terrorists and I suspect they are interrogating heavily any terrorists they have captured alive.