Aerostat being tested by the Hellenic Coast Guard for FRONTEX.

Naval News reports that the Hellenic Coast Guard is doing something of a 28 day comparison test between land based and Aerostat based surveillance systems on the island of Samos.

Putting a radar at 1000 meters should provide a radar horizon of about 70 nautical miles and allow detection of a 50 foot high target at up to 79 miles.