Electronic Navigational Charts (ENC) are databases standardised as to content, structure and format, issued for use with ECDIS on the authority of government authorised hydrographic offices. ENC contains all the chart information necessary for safe navigation, and may contain supplementary information in addition to that contained in the paper chart which may be considered necessary for safe navigation. (IHB 1997)

Official electronic navigational charts (ENC) issued by the Hydrographic Institute of the Republic of Croatia are available through PRIMAR RENC (regional ENC coordinating centre) and its network of authorised distributors www.primar.org.