Many response teams work in remote locations where mobile networks are not available, or are available sporadically. Being able to create an incident offline (a placeholder, if not full details) allows capturing incident attendance.
Response Utilities version 1.0.8 has an option to create an incident, attach members (even offline) and queue that incident until on network and the information can be uploaded to D4H.
This ability is available for beta testing. Please check it out and provide feedback.
Note: This ability is (of course) dependent upon the user having the required permissions for their account in D4H.