U 28: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_28.htm

U 29: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_29.htm

U 30: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_30.htm

U 32: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_32.htm

U 33: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_33.htm

U 34: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_34.htm

U 35: http://www.U-35.com

        http://www.swanseahistoryweb.org.uk/history/bristolc/boatops/atlantic.htm

U 47: http://www.pickelhaube.de/2wk/prien.htm

U 47: http://www.ccbox.de/FalkeB/Geschichte/body_u47.html (not tested)

U 48: http://home.t-online.de/home/mannes-ubootseiten/

U 66: http://www.uboatarchive.net/U-66.htm

U 95: http://www.dutchsubmarines.com/specials/special_battle_by_moonlight.htm

U 96: http://home.t-online.de/home/0675394585-0001/u-96.htm

"Das Boot" movie "U 96": http://www.dasboot.de.cx/

U 99: http://www.u-99-page.de/

U 110: http://members.aol.com/robikusch/U110.html

U 118: http://www.uboatarchive.net/U-118.htm

U 128: http://www.uboatarchive.net/U-128.htm

U 172: http://www.uboatarchive.net/U-172.htm

U 173: http://www.user.tu-berlin.de/~michfaee/index.html

U 177: http://www.lexikon-der-wehrmacht.de/Zusatz/Marine/UBootFarbe.htm

U 182: http://users.1st.net/dhancock/U-182/U-182.html

U 185: http://www.uboatarchive.net/U-185.htm

U 188: http://www.ftech.net/~scotland/u188p1.htm

U 199: http://www.uboatarchive.net/U-199.htm

U 220: http://www.uboatarchive.net/U-220.htm

U 233: http://www.uboatarchive.net/U-233.htm

U 234: http://www.uboatarchive.net/U-234.htm

U 242: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_242.htm

U 247: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_247.htm

U 256: http://www.uboatarchive.net/U-220.htm

U 260: http://www.iol.ie/~hofnanet/Pages/U260.html

U 281: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_281.htm

U 325: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_325.htm

U 352: http://www.uboatarchive.net/U-352.htm

  and    http://www.fayettevilleobserver.com/news/archives/1999/tx99feb/n14boat9.htm

U 371: http://www.uboatarchive.net/U-371.htm

U 378: http://www.uboatarchive.net/U-378.htm

U 413: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_413.htm

U 434: http://www.U-434.com (currently http://home.att.net/~rodney.j.martin/heyda.htm)

U 463: http://www.dasch.purespace.de/

U 490: http://www.uboatarchive.net/U-490.htm

U 505: http://www.msichicago.org/exhibit/U505/U505home.html

U 515: http://www.uboatarchive.net/U-515.htm

U 516: http://www.uboatarchive.net/U-516log.htm

U 521: http://www.uboatarchive.net/U-521.htm

U 534: http://web.ukonline.co.uk/gaz/u-534.html

U 544: http://www.uboatarchive.net/U-544.htm

U 568: http://users.erols.com/sepulcher/568details.html

U 569: http://www.uboatarchive.net/U-569.htm

U 570: http://members.aol.com/robikusch/U570.html

U 575: http://home.t-online.de/home/melstermann/homepage/

"U 571" movie: http://www.u571.com

U 604: http://www.uboatarchive.net/U-604.htm

U 667: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_667.htm

U 714: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_714.htm

U 740: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_740.htm

U 758: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_758.htm

U 775: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_775.htm

U 825: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_825.htm

U 853: http://www.ecophotoexplorers.com/u853.htm

U 860: http://www.uboatarchive.net/U-860.htm

U 963: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_963.htm

U 977: http://www.uboatarchive.net/U-977.htm

U 995: http://www.uboot995.de

U 1019: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_1019.htm

U 1021: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_1021.htm

U 1023: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_1023.htm

U 1024: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_1024.htm

U 1051: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_1051.htm

U 1055: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_1055.htm

U 1058: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_1058.htm

U 1064: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_1064.htm

U 1105: http://denix.cecer.army.mil/denix/Public/ES-Programs/Conservation/Panther/panther2.html

U 1169: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_1169.htm

U 1172: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_1172.htm

U 1195: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_1195.htm

U 1202: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_1202.htm

U 1229: http://www.uboatarchive.net/U-1229.htm

U 1276: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_1276.htm

U 1302: http://www.swanseahistoryweb.org.uk/history/bristolc/uboats/u_1302.htm

http://www.sonic.net/~books/new.html

WWI:

U 35: http://worldwar1.com/arm012a.htm