Ustanova za plovne puteve:
http://www.plovput.rs/

Vodostaji:

Madjarska
http://www.hydroinfo.hu/Html/hidinfo/duna.html

Hrvatska
http://www.voda.hr/Default.aspx?art=161&sec=2

Srbija
http://www.hidmet.gov.rs/ciril/osmotreni/stanje_voda.php

Rumunija
http://www.afdj.ro/cote/cote_en.htm

Bugarska
http://www.appd-bg.org/siteen/wrap.php?3

Luke:

www.portofconstantza.com

www.danubeports.info

Market info:

www.bunkerworld.com

www.bunkerindex.com

www.bloomberg.com