Traditional systems of marine engine seating on metal and polymer chocks have been discussed and a new way of engine seating on polymer-metal chocks, of author’s own design has been presented as to such background. The author’s own designed chocks have been patent protected since 24.07.2000, patent number 192120 issued to Bohaterów Westerplatte Naval Academy in Gdynia. The chocks were designed to set the engines and other aggregates on the foundation. They ensure an appropriate alignment of the engine against the crankshaft power takeoff systems. The results of the tests carried out on the chocks have been presented proving that they meet the strength parameters required by the manufacturers of marine engines and comply with the regulations of the classification societies.