This is the research side of implementation topics for hailing.
When the user has positively crashed, we need to hail one or more recipients.
When should this happen? Immediately? Automatically a short delay? After detecting no movement for a period?
Who/what is contacted? The simplest first-step is texting a contact in the user's address book. But we could contact groups of people, emergency services, social networks (twitter, facebook) too.
Choosing recipients: Should the recipients vary based on the environment? Like crash severity?
Method of hailing: Automated call? User configured voicemail? Text? Email? Notification?
Hailing information: What information should be included in a hail?
This is the research side of implementation topics for hailing.
When the user has positively crashed, we need to hail one or more recipients.