Boat Chair

FIG. 1 is a front, right, top perspective view of a boat chair, showing my new design; FIG. 2 is a rear, left, bottom perspective view thereof; FIG. 3 is a front elevational view of the enlarged scale thereof; FIG. 4 is a rear elevational view of the enlarged scale thereof; FIG. 5 is a left side view of the enlarged scale thereof; FIG. 6 is a right side view of the enlarged scale thereof; FIG. 7 is a top plan view of the enlarged scale thereof; FIG. 8 is a bottom plan view of the enlarged scale thereof; FIG. 9 is an enlarged view of detail 9 in FIG. 2 ; FIG. 10 is an enlarged view of detail 10 in FIG. 2 ; FIG. 11 is an enlarged view of detail 11 in FIG. 7 ; FIG. 12 is a front, right, top perspective view of the boat chair in an alternate configuration; and, FIG. 13 is a front, right, top perspective view of its reduced scale in an alternate configuration. The dashed broken lines in the figures are for the purposes of illustrating portions of the boat chair and form no part of the claimed design. The dash-dot-dash broken lines are for notating enlarged views and form no part of the claimed design.