Mobile Binocular Chair!

Great how you've solved at least two of the main problems associated with binocular chairs: 

    first: for panning, the chair can easily scoot around the pier, without you having to get up off of the chair

    second: there will be absolutely no heartbeat in the view, no matter how large the binoculars

If you swap in a zero gravity chair, and add a good neck rest, I expect that high elevation viewing will be comfortable as well.