User blog comment:FairyRaven/Fairy Tail Chapter 453: A Father's Job, Review and Commentary/@comment-109.69.5.239-20150919192112/@comment-7418318-20150920162426

If he could make such large-scale, long-range transportations, they wouldn't have needed to come in airships in the first place... unless of course Marin was the one to transport the airships in the first place.

That would explain how they could just appear deep inside the range of the radar without detection. But if they can just teleport in, why teleport in on airships? Is their support-firepower really worth it? With all the mass the ships take up, they could have sent an entire army or two instead.