Strong team to take forward the project beyond this hackaton. A useful solution, which might be complex to sell to governments / emergency teams. Ideally you should try and not to add another NFC device, but try to integrate the concept into an existing device ( apple watch / smartphone ) or wearable ( sawn into a uniform )

Unsure if using Blockchain is required.

good pitch working design, 1 dollar no internet connection lambda system move to disasted hyberledger delivery government

excellent presentation; good research; good team composition; Cost and business model might need some thought