I use what is called a draftsman office chair or a task office chair (taller than regular office chair). I found one at a used office supply furniture store for $150. It retailed for $1600 new. It has adjustable height, as well as adjustable back, seat, armrests, lumbar support, etc. Extremely comfortable. I replaced the casters with factory glides/feet ($40). Our pilothouse is carpeted and the glides provide enough friction to keep my 260# in place during most sea conditions but make it easy to move for access when not in use. I have a padeye in the sole that can be quick connected to the pedestal with a nylon ratchet strap in rough seas.
I had previously used a Garelick base with a boating seat. I found it poorly designed and no longer available in the tall size.
Tator
