NexNav MAS SBAS is a satellite sensor that utilizes the signals coming from Global Positioning System (GPS) satellite constellation and satellite-based augmentation systems (SBAS).  Wide Area Augmentation System (WAAS) is one example of SBAS.  It also supports EGNOS, MSAS and GAGAN to the extent they are compatible with WAAS.

They are GPS sensor units designed to meet the requirements of US FAA TSO C145c and intended for installation on board civil aircraft.  Their primary function is to provide aircraft position, aircraft velocity and precise time.

Part numbers 91000S and 93000S share a common mechanical enclosure. Both have a TNC-type antenna connector and a 25 pin D-type connector for all other input/output. Part numbers 91000S and 93000S support the RS-232-based NexNav Binary interface protocol. Part number 91000S is authorized US FAA TSO C145c, Class Beta 1.  Part number 93000S is authorized US FAA TSO C145c, Class Beta 1, 2, 3.

Part numbers 41100S and 431000S share a common mechanical enclosure. Both have a TNC-type antenna connector and a 44 pin D-type connector for all other input/output. Part numbers 41100S and 431000S support the ARINC 429 / 743 A-5 interface protocol. US FAA TSO approvals are pending for both.  Part number 41100S will be US FAA TSO C145c, Class Beta 1 approved.  Part number 43100S will be US FAA TSO C145c, Class Beta 1, 2, 3 approved.