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.
Because the term record locator is usually used to refer to a PNR the two terms can become confused. When a reservation is made a PNR is created in the system used by the person making the booking. This PNR will have a record locator. If the booking has been made through the airline and the only flight(s) are operated by the airline making the reservation only one PNR will exist.