Whaly 500 The Whaly 500 is suitable for many purposes, an open boat made of high-grade plastic (Polyethylene). The model is unique by its big inner space and multi-use! ; for recreational use, but also very suitable for professional purposes. Whether you are looking for a stable Work boat, escort craft for a sailing school, a Whaly boat for rescue operations or a rugged Whaly for your boat rental business, Whaly’s, well thought-out design, which emphasises strength and stability, offers many options.