Siskiwit is sloop rigged.  About one-third of the Offshore 40s are sloops.
Siskiwit has a classic, two cabin layout.  She has a center folding table and with transom berths and pilot berths on each side.  The galley is aft, with stove and sink to starboard, icebox and chart table to port.  We have identified five sisterships with this layout.

There were two other two-cabin layouts, with dinettes to port or starboard.  We have identified twelve sisterships with those layouts.