When you're stuck -- running out of gas, with no alternates -- you let-down with whatever you have.
There's no other option.
And then, when you have a glimpse of the ground, you hope it's something you recognize.
If not, in a Hurricane in 1943, you climb back up and bail out.
There's no ILS and no Cat III.
That's not to say it can't be done. Alex Henshaw apparently did it regularly using the plume of smoke from the factory. That plume would emerge from the low overcast and allow him to locate himself. He'd then use his compass and align on it and use a previously worked out rate of descent and magically see the grass as he was about to flare.
I remember thinking about doing the same thing in Sudbury, using the pulp mill plume (very smelly, but clearly in view), but I was an F/O in those days, and convincing the Captain was too much work.