The TT logo on the tail is for Townsend Thoresen, a ferry company who were renamed to P&O European Ferries in 1987. Registered as G-DJBI in 1978, G-FERY in 1980, G-MSLY in 1988, N64CA in 1989, VR-CSS in 1991 then N507AB and converted to Cessna 551 c/n 551-0077 in 1992 and N16TS in 2000. Current on the register in 2024.