Aaron used his improved conjuring abilities to conjur himself a massive phantom army. he then had those phantoms construct massive semi-phantom ships for use in season 2's "Set sail" theme.
an "Armada" is a massive fleet of ships of the same affilliation.
Aaron's armada consists of these ships:
Caeruleus virgo (the blue maiden) (flagship)
15 phantom galleons
10 phantom corvettes
10 phantom schooners
10 phantom sloops
Types of ships in Aaron's armada in detail
Flagship: "A flagship is a vessel used by the commanding officer of a group of naval ships, reflecting the custom of its commander, characteristically a flag officer, flying a distinguishing flag. Used more loosely, it is the lead ship in a fleet of vessels, typically the first, largest, fastest, most heavily armed, or, in terms of media coverage, best known." -wikipedia
Galleon: "A galleon was a large, multi-decked sailing ship" -wikipedia
Corvette: Corvettes were smaller than frigates and larger than sloops, usually with a single gun deck.
Schooner: A fast 3 masted ship
Sloop: A small, nimble 1 masted vessel. mostly used for scouting and light skermish combat.