Per the Update 22 Patch 2 release notes:
"Airships and Amenities:
Airship Amenity Deeds can now appear in quest arc End Reward lists.
Amenity buffs are now based on the level of the guild whose airship is being used.
You can now name your guild's airship! Your airship can be named for free when first purchased, and can be renamed once for free by using the rename option available in the Airship Vendor UI in the Airship Showroom in the Harbor.
The Sign of the Silver Flame buff now gives its correct 5/10/15 Light and Fire Spell Power and Fire Resistance.
The Hag Apothecary tooltip now states what the amenity does.
Guild XP buffs are no longer dispellable by enemies.
When placing or removing an amenity, the UI will now close to allow the player to go right to the amenity.
The Banquet Hall Spirit Binder is no longer being paid off by the Rusty Nail, and will now correctly bind characters to their airship.
White Airship Sail dyes now properly dye the sails white.
Several typos have been fixed in amenity descriptions."
Lamannia Release notes