What does this do … I’m stumped

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It is definitely a control lever for the seat or pedestal. The T handle to the right might be slide lock or rotate lock. You should be able to figure out what that does and eliminate one option from the possible list. General seat controls are slide, rotate and in rarer cases seat back adjustment/tilt back release.
The pedestal is not your standard type and might be height adjustable. Are there knobs or set screws on that thick ring on the pedestal?
Is the seat height possible electrically controlled?
Does the mystery lever move forward and aft?
 
It looks like some type of mechanical control (cables) for maybe sliding the chair? Follow the cables and it should tell you the function.
The cables disappear between the bottom of the seat and the frame. I have figured out the rest of the controls …not that hard …up … down … swivel .. in and out … but that one has me stumped. I left a message with GW… but haven’t heard back from them yet
 
Have you sat down on the seat while flipping the lever/button side to side? My initial thought was something to do with the comfort of the seat, like a lumbar support or something similar?
 
Have you sat down on the seat while flipping the lever/button side to side? My initial thought was something to do with the comfort of the seat, like a lumbar support or something similar?
That’s what I was thinking as well but I didn’t see or feel any change. And it stays under the seat pan .. not up the back. Initial thought was perhaps the front roll where your thighs are .. but haven’t seen any difference there either. I also thought maybe a flip up seat base but the frame wont allow that … it’s solid
 
That’s what I was thinking as well but I didn’t see or feel any change. And it stays under the seat pan .. not up the back. Initial thought was perhaps the front roll where your thighs are .. but haven’t seen any difference there either. I also thought maybe a flip up seat base but the frame wont allow that … it’s solid
I’m hoping SOMEONE with an express will answer me .. it’s driving me nuts not knowing about something in the boat