World 8-Airship (Super Mario Bros. 3)
From the Super Mario Wiki
World 8-Jets is the sixth level of Dark Land in Super Mario Bros. 3. The level icon is placed after the Hand Traps and its own completion opens World 8-1. The level will immediately start when the player character steps onto the map icon, which has a different appearance than the other Airship icons in the game, with what appears to be a Rocky Wrench popping out.
Like with other Airship levels, this level autoscrolls, though it scrolls at a faster rate than usual. This Airship fleet is comprised of several small platforms, almost all of which have a Burner on the back end and a Rocky Wrench or two stationed on them. The gaps between the platforms vary in size, from small, one block length gaps to large chasms. If the player can make it to the Warp Pipe at the end of the level, they will have to fight Boom Boom, who is able to fly after stomping him the first time. Defeating Boom Boom will clear the stage.