Convertible lavatory systems and methods for an internal cabin of a vehicle

A vehicle comprising:

• an internal cabin;
• and
• a lavatory system within the internal cabin, the lavatory system including:
• a monument defining an internal chamber, wherein the monument comprises a contoured wall configured to conform to at least a portion of a shape of one or more passenger seats within the internal cabin, and wherein the monument has fittings configured to be secured to seat tracks within the internal cabin;
• a first toilet within the internal chamber;
• a second toilet within the internal chamber;
• a moveable wall disposed between the first toilet and the second toilet, wherein the moveable wall is moveable between (a) an extended position, in which the lavatory system provides a first lavatory compartment including the first toilet, and a second lavatory compartment including the second toilet, and (b) a stowed position, in which the lavatory system provides an expanded lavatory compartment that encompasses the spaces of both the first lavatory compartment and the second lavatory compartment, wherein the expanded lavatory compartment provides a contiguous space in which the first lavatory compartment is open to the second lavatory compartment;
• a stowage chamber within the internal chamber, wherein the stowage chamber retains emergency equipment, wherein the stowage chamber is within the internal chamber and secured to one or both of a rear wall or a side wall of the monument, and wherein the stowage chamber is contained behind a curved shroud that connects to one or more of a ceiling, the rear wall, or the side wall;
• and
• a pedestal that has one or more portions that are shaped to provide additional space within the internal chamber, wherein pedestal extends vertically from a base floor, and is recessed toward a front wall of the monument.