System Description

System Description and Installation Manual for MXS ICD10004-01

Net Mask: A net mask is a 32-bit mask used to divide an IP address into subnets and specify

the network's available hosts. In a netmask, two bits are always automatically assigned.

NMEA 0183 message (using GPRMC): The National Marine Electronics Association (NMEA) defines a

messaging protocol called 0183. GPRMC is a specific message type within that protocol.

Non-volatile memory: Data stored in non-volatile memory is not lost when power to the device is removed or

interrupted.

SOG: Speed over ground. The speed of a vessel relative to the surface of the earth.

Squawk code: The ATC system for a given geographic area assigns a unique four-digit number to each MXS

equipped aircraft in that area. This number is called a squawk code, and it is transmitted by the MXS only

when interrogated by ATC to aid in aircraft identification.

TAS: True air speed. The speed of the aircraft relative to the airmass in which it is flying.

TIS-B: Traffic Information Services – Broadcast. TIS-B complements the operation of ADS-B by providing

ground-to-air broadcast of radar-derived aircraft surveillance data, including from aircraft not equipped for

1090 MHz ADS-B.

UTC: Universal Time Coordinated. A coordinated time scale, maintained by the Bureau International des

Poids et Mesures (BIPM). UTC was formerly known as Greenwich Mean Time (GMT).