the type h was the major production version of the fba series and was operated by several air arms during the latter part of the first world war. the great majority served with french and italian forces. the escadrille des hydroviators of the belgian air force was also equipped with the type and one survives on display in the royal museum of the armed forces and of military history in central brussels. four ex-italian, isotta fraschini powered type hs were used by the british royal navy as training machines.