Abstract: The invention relates to a self-sufficient resource-pooling system (1) for risk sharing of a variable number of risk exposed aircraft fleets (81, . . . , 84) related to airspace risks, wherein resources of the risk exposed aircraft fleets (81, . . . , 84) are pooled by the system (1) and a self-sufficient risk protection is provided for the risk exposed aircraft fleets (81, . . . , 84) by means of the system (1) preventing imminent grounding or operational collapse as a consequence of an occurrence of a natural disaster events, such as volcanic eruptions. The risk exposed aircraft fleets (81, . . . , 84) are connected to the system (1) by means of a plurality of payment-receiving modules configured to receive and store payments from the risk exposed aircraft fleets (81, . . . , 84) for the pooling of their risks and resources and loss cover is provided based on the pooled resources and risks by means of the system (1).

Abstract: An avionic system including: a memory that stores a selectable hash table assigned to a flight plan of an aircraft fleet, the hash table including table elements with operational parameters of an airport, wherein airports covered by the table elements are airports flown to according the fight plan of the aircraft fleet; and a plurality of ground stations situated at the flown to airports of the fight plan, wherein the ground stations are linked via a communication network to a central processing unit; a receiver of the central processing unit that receives, via a communication network interface, a transmission from a detection device, the transmission including at least parameters regarding a time interval parameter of an airport closing and an airport identification.

Abstract: An avionic system including: a memory that stores a selectable hash table assigned to a flight plan of an aircraft fleet, the hash table including table elements with operational parameters of an airport, wherein airports covered by the table elements are airports flown to according the fight plan of the aircraft fleet; and a plurality of ground stations situated at the flown to airports of the fight plan, wherein the ground stations are linked via a communication network to a central processing unit; a receiver of the central processing unit that receives, via a communication network interface, a transmission from a detection device, the transmission including at least parameters regarding a time interval parameter of an airport closing and an airport identification.