After several scouting ships disappeared at the hands of the pirates, they eventually stopped showing up in the area close to Pirate Haven. The delegation or the individuals in charge of it had probably realized that the scouts around Pirate Haven couldn't escape the pirates' claws, and it wouldn't matter even if they sent more of them.
The pirates didn't care since it only meant they had more time to prepare for the delegation's arrival. According to the scouts, it wasn't far away, after all.
Only a few days after the last scout was captured, interrogated, and thrown in the dungeons of the city, the long-distance detection gadgets finally picked up the delegation's tracks.
However, the delegation progressed slowly and safely, so it took yet another day for the armada of ships to appear in sight.
Even from a distance, the ships from the four kingdoms were easily discernable.