Supra SL Owner's Manual page 59

Triple-Up Seating
Supra boats have "Triple-Up" seating. This unique type of
seating can be stored flat or flipped up for extra rear facing
seating. To use this seating, press the red locking lever on
the starboard side, lift and pull the seat back into the locked
position. Be sure that the metal arms are locked straight
before applying pressure. To lay seat back down, simply
pull the lever section of the metal support arm to release
the lock mechanism.
Convertible Rear Seat
Some Supra models are equipped with a convertible rear seat.
The rear seat lifts from the back, hinges forward, and can be
used for a cockpit table. Lift the table forward and it becomes
a rear facing seat.
The convertible rear seat back does not lock into place. It is not
intended as support. Do not lean on or use as a brace in case
of sudden change in direction.
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