means the resource includes an illustration of the ship
means the resource includes a main entry about the ship
means the resource includes a passenger or crew list for the ship
means the resource is in the premium database
means the resource was added in the past 45 days
means the resource requires an additional subscription to access
means the resource is a book
means the resource is a journal (magazine)
means the resource is a native online resource (digitized books or journals
are still noted as 'book' or 'journal', even when they're accessed or accessible online)