 Markgraf was never raised for scrapping , unlike most of the other capital ships that were scuttled . Markgraf and her two sisters had sunk in deeper water than the other capital ships , which made any salvage attempt more difficult . The outbreak of World War II in 1939 put a halt to all salvage operations , and after the war it was determined that salvaging the deeper wrecks was financially impractical . The rights to future salvage operations on the wrecks were sold to Britain in 1962 . Owing to the fact that the steel that composed their hulls was produced before the advent of nuclear weapons , Markgraf and her sisters are among the few accessible sources of low @-@ background steel , which has occasionally been removed for use in scientific devices . Markgraf and the other vessels on the bottom of Scapa Flow are a popular dive site , and are protected by a policy barring divers from recovering items from the wrecks . 
 Markgraf was never raised for scrapping , unlike most of the other capital ships <a href='null_relcl' title='1'><mark>that</mark></a><a href='uninflect' title='2'><mark>were</mark></a> scuttled . Markgraf and her two sisters <a href='been_done' title='3'><mark>had</mark></a> sunk in deeper water than the other capital ships , which made any salvage attempt more difficult . The outbreak of World War II in 1939 put a halt to all salvage operations , and after the war it was determined that salvaging the deeper wrecks was financially impractical . The rights to future salvage operations on the wrecks <a href='uninflect' title='4'><mark>were</mark></a> sold to Britain in 1962 . Owing to the fact that the steel <a href='null_relcl' title='5'><mark>that</mark></a>composed their hulls was produced before the advent of nuclear weapons , Markgraf and her sisters are among the few accessible sources of low @-@ background steel , which <a href='been_done' title='6'><mark>has</mark></a> occasionally been removed for use in scientific devices . Markgraf and the other vessels on the bottom of Scapa Flow <a href='drop_aux' title='7'><mark>are</mark></a>a popular dive site , and are protected by a policy barring divers from recovering items from the wrecks . 
Markgraf was never raised for scrapping , unlike most of da other capital ships was scuttled . Markgraf and her two sisters done sunk in deeper water than tdaother capital ships , which made any salvage attempt more difficult . The outbreak of World War II in 1939 put a halt to alll salvage operations , and after thdaar it was determined dat salvaging thedaeper wrecks was financially impractical . The rights to future salvage operations on the wrecks was sold to Britain in 1962 . Owing to the fact that the steel composed their hulls was produced b4 the advent of nuclear weapons , Markgraf and her sisters are among the few accessible sources of low @-@ background steel , which done occasionally been removed for use in scientific devices . Markgraf and the daer vessels on the bdaom of Scapa Flow a popular dive site , and r protected by a policy barring divers from recovering items from the wrecks .