The 16th English galleasses had only the oars in common with the Mediterranean ship type and were closer to carracks and similar to the later galleons; Childs (2009), pp. 22–24.
According to naval historian Roger Charles Anderson three were built for the Russian fleet, two in 1809 and one as late as 1823; Anderson (1962) p. 97. Jan Glete put the number of Russian-built hemmemas at five, all constructed during the war of 1808–09. The most recently published study by Tredrea and Sozaev puts the total at six gemams, the Russian rendering of "hemmema".
