I think those are standard SMB-installed ATS steps.
BTW, if there aren't any significant problems, this seems like a steal, especially with the V10. I do see some (surface) rust, probably from being near the ocean. No mention of what looks to be a Cummins generator.
Herb
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SMB-less as of 02/04/2012. Our savings account is richer, but our adventures are poorer.