East German series "River Ships of GDR" ("Binnenschiffe der DDR"): tug-pusher (Schubschiff), pusher with barges (Schubverband), passenger diesel-electrical ship (Dieselelektrisches Seitenrad - Fahrgastschiff), icebreaker (Eisbrecher), selfpropelled barge (Motorguterschiff), dredger (Eimerketten Schwimmbagger) (1981)

 Slovakian stamp: motor ship of the type "Valerian Kuybyshev" (slovakian designation - OL400) (1993)

 Hungarian stamp: hydrofoil of the type "Meteor" in Budapest (1972)

 Hungarian series "Danubian Commission" ("Commission du Danube"): hydrofoil of the type "Raketa" (1969)
 Letter

 Sources: International Hydrofoil Society and own collection