A seat for a vehicle, comprising: a seat pan , having a seat pan front edge, a seat pan rear edge, a seat pan top surface, and a seat pan bottom surface, wherein the seat pan front edge defines a first pivot axis that is in a fixed relationship with the seat pan front edge and the seat pan rear edge defines a second pivotaxis; a backrest , having a backrest top edge and a backrest bottom edge, wherein the backrest bottom edge is articulately disposed adjacent to the seat pan rear edge; a headrest , having a headrest top edge and a headrest bottom edge, wherein the headrest bottom edge is articulately disposed adjacent to the backrest top edge; two armrests positioned adjacent lateral sides of the seat pan, wherein the armrests define top surfaces that are disposed a predetermined height above the seat pan top surface, wherein the seat pan , the backrest , and the headrest are positionable with respect to one another such that the seat is configurable into at least one of a taxi, takeoff and landing position, a napping position, and a sleeping position, wherein the first pivot axis remains in a substantially fixed position for the taxi, takeoff and landing position, the napping position, and the sleeping position, wherein the predetermined height varies for each of the taxi, takeoff and landing position, the napping position, and the sleeping position, wherein the predetermined height for the taxi, takeoff and landing position is greater than the predetermined height for the napping position, and wherein the predetermined height for the napping position is greater than the predetermined height for the sleeping position. a seat pan , having a seat pan front edge, a seat pan rear edge, a seat pan top surface, and a seat pan bottom surface, wherein the seat pan front edge defines a first pivot axis that is in a fixed relationship with the seat pan front edge and the seat pan rear edge defines a second pivotaxis; a backrest , having a backrest top edge and a backrest bottom edge, wherein the backrest bottom edge is articulately disposed adjacent to the seat pan rear edge; a headrest , having a headrest top edge and a headrest bottom edge, wherein the headrest bottom edge is articulately disposed adjacent to the backrest top edge; two armrests positioned adjacent lateral sides of the seat pan, wherein the armrests define top surfaces that are disposed a predetermined height above the seat pan top surface, wherein the seat pan , the backrest , and the headrest are positionable with respect to one another such that the seat is configurable into at least one of a taxi, takeoff and landing position, a napping position, and a sleeping position, wherein the first pivot axis remains in a substantially fixed position for the taxi, takeoff and landing position, the napping position, and the sleeping position, wherein the predetermined height varies for each of the taxi, takeoff and landing position, the napping position, and the sleeping position, wherein the predetermined height for the taxi, takeoff and landing position is greater than the predetermined height for the napping position, and wherein the predetermined height for the napping position is greater than the predetermined height for the sleeping position. <EOS>