Kortik (Ко́ртик) may be the Russian for naval dirk a nickname for Kashtan CIWS, a weapons system of the Russian navy a 1948 children's book by Anatoly Rybakov, translated into English as The Dirk Kortik (1954 film), an adaptation of Rybakov's book, by Vladimir Vengerov and Michael Schweitzer Kortik (1973 film), an adaptation of Rybakov's book for TV by Nikolai Kalinin