(A console starts beeping.)
DAX: Some kind of large subspace surge has just activated our security sensors.
KIRA: Where is it?
DAX: Bearing one four eight mark two one five. Distance three hundred metres.
O'BRIEN: Three hundred metres? That's almost inside our shield perimeter.
DAX: From the intensity and the harmonic signature, it could be a cloaked ship, but I've never seen an energy dispersal pattern like this.
KIRA: It's too close for comfort, whatever it is. Red Alert. Raise shields, energise phaser banks, stand-by to lock photon torpedoes on
DAX: The energy signature's fluctuating. It's decloaking.
(It's Starfleet, NX 74205, which makes it a prototype for its class.)
DAX: It's definitely a Federation starship but I've never seen that design before.
O'BRIEN: A Federation ship with a cloaking device?
DAX: It's hailing us.
KIRA: On screen.
SISKO [on viewscreen]: Hello, Major. Sorry to startle you, but I wanted to test the Defiant's cloaking device.
KIRA: The Defiant?
SISKO: I've brought back a little surprise for the Dominion.