Abstract: A method comprising: receiving data; determining that the data match a specification of a fixed risk contract; determining, based on the data, that a threshold of the fixed risk contract has been met, wherein the threshold comprises a total quantum of a contract settlement reference methodology meeting the specification of the fixed risk contract; and triggering a payout of the fixed risk contract in response to the determination that a threshold of the fixed risk contract has been met. A method comprising: receiving extrinsic data; calculating a probability that a threshold of a fixed risk contract will be met based on the extrinsic data; calculating a margin for a short party of the fixed risk contract based on the probability.

Abstract: A passenger location system comprises a plurality of radio transceivers at predetermined locations in a passenger terminal facility. At least one transponder is associated in use with a passenger. The transponder is adapted to transmit a radio signal in response to receiving a signal from one or more of the transceivers. The transponder signal is capable of being received by more that one transceiver. The passenger location means is adapted to determine the position of the transponder by determining the location of the one or more transceiver that have received the transponder signal.

Abstract: A passenger location system comprises a plurality of radio transceivers at predtermined locations in a passenger terminal facility. At least one transponder is associated in use with a passenger. The transponder is adapted to transmit a radio signal in response to receiving a signal from one or more of the transceivers. The transponder signal is capable of being received by more that one tranceiver. The passenger location means is adapted to determine the position of the transponder by determining the location of the one or more transceiver that have received the transponder signal.