Satellite communicator contact information
It would be useful to have satellite communicator addresses on the roster along with contact information. This could be voluntarily entered on the member page, not publicly visible, just of use by the roster, similar to the emergency contact.
The reasoning: Unless replying to a message, a person's Garmin InReach can only be contacted directly using this InReach address. However, these are seldom shared among party members. The ability to directly contact a party member via satellite is a powerful tool in an emergency. Separated party members could communicate with each other. Overdue parties might be contacted. Additional contact would be available in an emergency callout.
Two-way satellite communicators, other than Garmin's, should have a contact address that looks like a phone number or email address.