15:13 is a biblical reference from the Bible, specifically from the New Testament, specifically the Gospel of John. The verse states: “Greater love has no one than this: to lay down one’s life for one’s friends.” This verse and the idea of “greater love” is often used as the motto for search and rescue teams and organizations, as it reflects the selfless and courageous spirit of those who put themselves in harm’s way to save others.

The Motto reflects the Search and Rescue Volunteer’s willingness to sacrifice themselves for others, putting their lives at risk to save others and the dedication they have to help those in need. The Motto also represents the idea of teamwork, that the volunteers are part of a bigger mission to save lives and support the community.

It also serves as a reminder that search and rescue can be a dangerous and risky endeavor, and that volunteers need to be prepared to make sacrifices for the sake of others. The motto is a call to action for volunteers to be willing to put themselves in danger to help those in need, it’s also a reminder that it’s a mission that require commitment, dedication and a sense of greater purpose.