what's even the need to transmit/receive GPS as part of the protocol?

Its optional but it helps to see where nodes are on a map, and would be useful in (for example) a search & rescue operation.

	▲	bigiain 3 hours ago \| parent [-]
		"useful in (for example) a search & rescue" I can't read that without assuming the real intent is to deliver bombs accurately, but the startup pitching it knows that'd get bad press, and the investors all know exactly what it really means...