About the only way we'd be hooped is if we lost all electrical including radios, there's stuff like VHF direction finding (VDF), you talk on the radio and they get a bearing to you, they tell you the heading and you fly the heading towards them. Over land, we'd just land near a house and use their phone if we lost all electrics. In a Jet Ranger, losing electrics signals the start of a very bad day since the fuel boost pumps are electric, the red page (emergency checklist) calls for immediate landing. Electrical systems are pretty redundant though in the bigger aircraft with backup batteries and such, so if you lose it all, you've probably got bigger things to worry about.
Cheers