The most basic of flt training Folks...Simulate an engine failure on T/O (in a C-150 or PA-28) and 9 out of 10 students look for and find a distant field that looks good...only problem it's too far away...
Excerise over now, and the end result is my students always came to realize that the answer to the ??? "Where can you land" is ALWAYS on whatever is below you...not some distant field...if not suitable then work outward from there, but be prepared to sacrifice the A/C to save yourself...
BTW, don't know about other Ops Manuals, but most airlines I've worked at have a bit in them that say the Capt should consider landing overweight vs. holding and dumping fuel...
In other words, get the thing on the ground, not embark on a cross-country oddessy with and unknown problem...