Tank Capacity Calculator - http://www.watertanks.com/calc.asp

Electronic CFR - http://www.ecfr.gov/cgi-bin/text-idx?c=ecfr&tpl=%2Findex.tpl

USCG Homeport - https://homeport.uscg.mil/mycg/portal/ep/home.do

American Waterways Operators - http://americanwaterways.com/

COFR Search - https://npfc.uscg.mil/cofr/default.aspx

FCC Call Sign Search - http://wireless2.fcc.gov/UlsApp/UlsSearch/searchShip.jsp

COD Search - http://www.st.nmfs.noaa.gov/st1/CoastGuard/VesselByName.html

NVICs - http://www.uscg.mil/hq/cg5/nvic/nvic.asp

USCG Navigation Center - http://www.navcen.uscg.gov/

NAMS - http://www.namsglobal.org/

TVIB - http://www.thetvib.org/