Thats the problem with relying on visual nav....you never know when it may fail. Luckily I always carry a GPS as a backup
Maybe its just me, but I think someone would have to be pretty stupid to take to the air, then rely on someone else to get them out of trouble, when they have all the nescessary kit with them ....There is no harm asking for help, but I would try to sort the problem out myself first....
EA