RIB Lomac Gran Turismo 10.5 – Review – The Boat Show Karel Overlaet, RIB Advocate The RIB Lomac Gran Turismo 10.5 with its twin 350 hp Yamaha engines can go over 50 knots. The video shows you this speed trial in the Bay of Silence in Sestri Levante on the Ligurian coast. RIB stands for Rigid Inflatable Boat. Others Also Read...LOMAC GT 11.0 RIB ReviewGreat All-rounder Highfield Patrol 540 ReviewImpressive LOMAC Granturismo 11.0 RIB Twin V8 300 hp VeradosBeautiful Lomac Granturismo 12 RIB Yamaha Powered