Redundant flotation is the key feature of this air-holding tube. High-density, non-absorbent foam is packed into each chamber. In the rare event of a breach in the polyurethane fabric and a loss of air pressure, the packed foam maintains the chambers shape and 90% of it's flotation factor.
A record locator is an alphanumeric code, typically 6 characters in length, used in airline reservation systems to access a specific record.
An event data recorder or EDR, sometimes referred to informally as an automotive black box (by analogy with the common nickname for flight recorders), is a device installed in some automobiles to record information related to vehicle crashes or accidents.