HTAWS

Question 1

You are operating a helicopter conducting HAA operations and the MK XXI EGPWS is inoperative. Are you authorized to conduct HAA operations under these conditions?

Answer 1

No you need HTAWS

Question 2

Generally speaking, what systems does an HTAWS system, Honeywell MK XXI EGPWS - for example, use to provide the pilot altitude and obstacles alerting?

Answer 2

Attitude
GPS
Known GPS database