meant to add...

In all circumstances that involve "parking" somewhere other than the home 'drome, communication is what you need. Most places have cell coverage, problem usually solved. Enough gaps exist that there is motivation for adding additional toys. The PLB doesn't add much. One button to call the cavalry. It's an incredibly limited tool.

A typical US glider pilot using 100 hrs of ten minute tracking and 6 months of service can have text messaging (and tracking and 911) from anywhere for about $150 annually with inReach.

If you do need to call the cavalry, the ability to communicate your immediate situation and needs will be of prime importance.

T8