Greek RIB Plefsi 4.95 Karel Overlaet, RIB Advocate Testing the Rigid Inflatable Boat (RIB) Plefsi 4.95 by the Greek company. Lots of specs on their website. Others Also Read...The Fun of Owning a Rigid Inflatable Boat (RIB): 8 ThoughtsSuperRib 30 Carbon Open 62 Knots Awesome TestingAre Rigid Inflatable Boats Safe?Impressive Dropping of a Rafnar RIB