A wave energy converting device for converting energy of water waves into electrical power, pressurized fluid, or other useful or transportable energy comprising: at least one float having a buoyant float body with a center of buoyancy; a base (100, 109 and 20) comprising a body or frame having at least one base pivot point or base pivot axis to which the at least one float is movably connected by at least one swing or drive arm to which the at least one base pivot point or base pivot axis is located substantially aft or down-sea of the at least one float's center of buoyancy and substantially below a still water line, wherein the at least one swing or drive arm controls an orientation and path of a wave-induced relative motion between the at least one float and the base (100, 109 and 20); a submerged mooring connection point which point's position is substantially motion stabilized, restrained, or fixed by at least one device selected from the group consisting of mooring lines, submerged or surface mooring buoys, seabed affixed or semi-submerged spars, pilings or towers, drag plates or planes, liquid or solid ballasts, seabed attachments, gravity weights, piers, platforms, docks, breakwaters, seawalls, shorelines, barges, ships, floating vessels, and combinations thereof; at least one elongated mooring beam rigidly connected to the base body or frame (100, 109 and 20) extending and pivotably connected in a horizontal and/or vertical plane to the submerged mooring connection point which point is located both substantially fore or up-sea of, and below, the at least one float's center of buoyancy; at least one power take-off apparatus secured to or within the base (100, 109 and 20) to be driven by at least one force generated by the wave-induced relative motion between the at least one float and the base through the at least one swing or drive arm, or to drive the at least one float during certain portions of each wave cycle; characterized by the at least one elongated mooring beam being rigidly connected to the base body or frame via a rigid connection, wherein vertical and horizontal dimensions between the at least one float's center of buoyancy and the mooring connection point are chosen such that during a typical wave cycle, a force moment produced by wave lateral or surge forces applied to the at least one float is substantially countered by an opposing force moment produced by wave vertical heave or buoyant forces applied to the at least one float thus reducing or eliminating undesirable rotation about, or translation of, the at least one base pivot point or base pivot axis, which base rotation or translation would otherwise reduce relative motion between the base and the at least one float. at least one float having a buoyant float body with a center of buoyancy; a base (100, 109 and 20) comprising a body or frame having at least one base pivot point or base pivot axis to which the at least one float is movably connected by at least one swing or drive arm to which the at least one base pivot point or base pivot axis is located substantially aft or down-sea of the at least one float's center of buoyancy and substantially below a still water line, wherein the at least one swing or drive arm controls an orientation and path of a wave-induced relative motion between the at least one float and the base (100, 109 and 20); a submerged mooring connection point which point's position is substantially motion stabilized, restrained, or fixed by at least one device selected from the group consisting of mooring lines, submerged or surface mooring buoys, seabed affixed or semi-submerged spars, pilings or towers, drag plates or planes, liquid or solid ballasts, seabed attachments, gravity weights, piers, platforms, docks, breakwaters, seawalls, shorelines, barges, ships, floating vessels, and combinations thereof; at least one elongated mooring beam rigidly connected to the base body or frame (100, 109 and 20) extending and pivotably connected in a horizontal and/or vertical plane to the submerged mooring connection point which point is located both substantially fore or up-sea of, and below, the at least one float's center of buoyancy; at least one power take-off apparatus secured to or within the base (100, 109 and 20) to be driven by at least one force generated by the wave-induced relative motion between the at least one float and the base through the at least one swing or drive arm, or to drive the at least one float during certain portions of each wave cycle; characterized by the at least one elongated mooring beam being rigidly connected to the base body or frame via a rigid connection, wherein vertical and horizontal dimensions between the at least one float's center of buoyancy and the mooring connection point are chosen such that during a typical wave cycle, a force moment produced by wave lateral or surge forces applied to the at least one float is substantially countered by an opposing force moment produced by wave vertical heave or buoyant forces applied to the at least one float thus reducing or eliminating undesirable rotation about, or translation of, the at least one base pivot point or base pivot axis, which base rotation or translation would otherwise reduce relative motion between the base and the at least one float.