A convertible passenger seat (20, 22), comprising: fixed seat elements or frame members; a seat back configured to track between the fixed seat elements or frame members between a first position near an aft end of the fixed seat elements or frame members and a second position near a forward end of the fixed seat elements or frame members; and a seat bottom configured to track between the fixed seat elements or frame members between a first position between the fixed seat elements or frame members and a second position at the forward end of the fixed seat elements or frame members; wherein the first position of the seat back together with the first position of the seat bottom corresponds to a forward-facing seat configuration, the second position of the seat back together with the first position of the seat bottom corresponds to a rear-facing seat configuration or an ottoman configuration, and the second position of the seat back together with the second position of the seat bottom corresponds to a storage configuration; characterized in that the convertible passenger seat (20, 22) further comprises a track assembly including: seat back guide tracks affixed along facing inboard sides of the fixed seat elements or frame members along which seat back trunnions engaged therein travel as the seat back tracks between the first and second positions of the seat back; and seat bottom guide tracks affixed along facing inboard sides of the fixed seat elements or frame members along which seat bottom trunnions engaged therein travel as the seat bottom tracks between the first and second positions of the seat bottom; wherein the seat back guide tracks are disposed spaced above the seat bottom guide tracks such that the seat back tracks above the seat bottom; and a seat belt having opposed ends slidably engaged in the seat back guide tracks or the seat bottom guide tracks, the seat belt usable as a seat belt or a securement strap in any combination of the first and second positions of the seat back and the seat bottom. fixed seat elements or frame members; a seat back configured to track between the fixed seat elements or frame members between a first position near an aft end of the fixed seat elements or frame members and a second position near a forward end of the fixed seat elements or frame members; and a seat bottom configured to track between the fixed seat elements or frame members between a first position between the fixed seat elements or frame members and a second position at the forward end of the fixed seat elements or frame members; wherein the first position of the seat back together with the first position of the seat bottom corresponds to a forward-facing seat configuration, the second position of the seat back together with the first position of the seat bottom corresponds to a rear-facing seat configuration or an ottoman configuration, and the second position of the seat back together with the second position of the seat bottom corresponds to a storage configuration; characterized in that the convertible passenger seat (20, 22) further comprises a track assembly including: seat back guide tracks affixed along facing inboard sides of the fixed seat elements or frame members along which seat back trunnions engaged therein travel as the seat back tracks between the first and second positions of the seat back; and seat bottom guide tracks affixed along facing inboard sides of the fixed seat elements or frame members along which seat bottom trunnions engaged therein travel as the seat bottom tracks between the first and second positions of the seat bottom; wherein the seat back guide tracks are disposed spaced above the seat bottom guide tracks such that the seat back tracks above the seat bottom; and seat back guide tracks affixed along facing inboard sides of the fixed seat elements or frame members along which seat back trunnions engaged therein travel as the seat back tracks between the first and second positions of the seat back; and seat bottom guide tracks affixed along facing inboard sides of the fixed seat elements or frame members along which seat bottom trunnions engaged therein travel as the seat bottom tracks between the first and second positions of the seat bottom; wherein the seat back guide tracks are disposed spaced above the seat bottom guide tracks such that the seat back tracks above the seat bottom; and a seat belt having opposed ends slidably engaged in the seat back guide tracks or the seat bottom guide tracks, the seat belt usable as a seat belt or a securement strap in any combination of the first and second positions of the seat back and the seat bottom.