Editing German submarine U-155 (1941) (section)

==Fifth patrol==

''U-155''{{'}}s fifth sortie involved her move to the western Caribbean and southern Florida, USA. She sank ''Lysefjord'' west of [[Havana]] on 2 April 1943, and on 3 April sank the [[oil tanker]] ''[[SS Gulfstate|Gulfstate]]'' about {{convert|50|nmi|abbr=on}} east northeast of [[Marathon Key]], Florida (in 2013 the [[National Oceanic and Atmospheric Administration]]'s Remediation of Underwater Legacy Environmental Threats (RULET) project found the sunken ''Gulfstate'' to be a potential source of oil pollution.<ref>{{cite web
|url=https://www.motherjones.com/blue-marble/2013/05/shipwrecks-world-war-ii-oil-leak-uboat
|title=How Hitler's U-Boats Are Still Attacking Us
|access-date=May 21, 2013
|author=Julia Whitty
|date=May 21, 2013
|work=Blue Marble
|publisher=[[Mother Jones (magazine)|Mother Jones]]
|quote=The vessel ranked worst on the NOAA's risk assessment scale is the WWII tanker ''Gulfstate'', torpedoed and sunk off the Florida Keys in 1943.
}}</ref>)

On the return journey ''U-155'' was attacked by an unknown aircraft on 27 April northwest of [[Cape Finisterre]], Spain.