Start Battles Port Assault Pirate hideout

Pirate hideout

 

Make sure all pirate ships are in the hideout befor attacking it.

 

If not, just wait for their return.
In case a pirate ship tries to escape, follow it. You will not have the chance to attack it a second time after the battle is over.
If only one of the pirate ships can escape, the pirate will get a new hideout. It does not matter if you capture or sink his ships.
On the other hand pirate hideouts can be very useful as you can increase your reputation by destroying them and loot some gold.