Abstract: A bobbin (14) is cantilever mounted to an upright member (14A) of an L-shaped bracket assembly (12) which in turn has a planar base member (12B) releasibly mounted to the rear deck (16) of a boat by means of suction cups (18A, 18B, 18C). The bobbin (14) extends in a direction substantially parallel to the underlying base member (12B) and is spaced from the base member (12B) to enable hand wrapping of the coil of rope (24) from the distal end of the bobbin (14). The bobbin (14) is releasably mounted to the upright bracket member (12A) for complete removal from a cylindrical bearing hole (32) the bracket assembly (12) or for axial rotary movement for winding the rope (24) using handles (34A, 34B, 34C) or for mounting the bobbin (14) to extend from the upright bracket member (12A) in a direction opposite to that of the base member (12B).

Abstract: A pair of open-sided and inverted channel members of substantially the same cross-sectional shape are disposed in laterally nested relation with the exterior transverse cross-sectional area of the inner channel member being substantially the same as the interior cross-sectional area of the outer channel member. The channel members are freely longitudinally shiftable relative to each other between relatively lengthwise extended and retracted positions and adjustable damper structure is carried by opposite ends of the channel members for adjustably throttling the discharge of combustion air therefrom when the channel members are disposed upon and supported from the floor portion of a fireplace upwardly through which a combustion air inlet opens.