if u had the opportuinity use Loran when it was still up .side by side u could convert, accurately some good plotters had a phantom loran system tjat could get u close
If u had couses plotted frpm an old loran chart then ur in business u can plot thoe speed time distance ,I used to log all courses manualluy in casre I ran fog W/O radar so n o matter what systen ur on the ciourse plotted off chart remains same
Loran C was far better than A if u just have numbers only than its a lot tougher, but I read somewhere that a mathematical table might be available that canget u close then u can initiate a serch pattern.
