There you go folks! That is the Scourge Undersea Web!
We've shipped our first "sandtrap"-style Channel Defense Trap: The Scourge Undersea Web!
A sandtrap is not a wall, it's more of a minefield. You can tear down a wall, and the wall is gone. The benefit of a sandtrap is you can't tear one of those down, no matter how much you shoot it, it's still there.
So what is different with a sandtrap?
A wall blocks ships from passing by. It also may have other properties like auras and the like. All this goes away when the wall is destroyed.
A sandtrap never blocks ships. It is a constant effect on the battlefield. Some effects are obvious: driving through it slows you and does some other nasty things depending on your faction membership.
For the Undersea Web, the primary sandtrap effect is apparent -- it has a permanent cavitation field for quite a distance around it -- and you can't shut it down. Cavitation fields surface subs, which makes your Gluttony fleets a much riskier proposition!
It further slows ships passing through and buffs the defense of buildings around it.
For the non-Scourge player, it has a nasty Corrosive DOT on it as you pass through. Won't kill you, but it will hurt badly. A smart defender will set up stuns and slows to lengthen the time spent in the sandtrap.
For Scourge players, there is an exceptional additional building defense buff around it, giving you the incentive to build a strong defensive cluster around the sandtrap centered on pure burst damage.
So to review, we now have 2 types of Traps:
1) Walls. They block you. You have to destroy them to pass. They are destroyed when you do enough damage to them. Their turrets and buffs/penalties end when you destroy it, as you would expect from a wall.
2) Sandtraps. They slow you. You can't permanently destroy them. The turrets mounted on them are destroyed when you do enough damage. The buffs/penalties never end, however. If you think "you can't destroy a minefield by shooting a missile at it" you will get the analogy.
I hope this helps understand our newest PVP Trap!