In these ways, the HPS is like other Shannons. In fundamental design and intent, though, it's altogether different. What may initially seem most heretical about this boat is its looks. "HPS" stands for High Powered Sailer, but the boat's lines above the waterline, especially aft, comprise the squarish forms of some trawlers or cabin cruisers. Sailors steeped in prototypical cruising-boat aesthetics, the kind exemplified by the Shannon 38, may be taken aback by their first impression of the 53 HPS. But a sailor whose tastes are steered more by the function in the form will love a second look.