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Appendix A<br />

Page A-4<br />

©20xx, RTCA, Inc.<br />

JTIDS Joint Tactical In<strong>for</strong>mation Distribution <strong>System</strong><br />

kg Kilogram<br />

LA Los Angeles<br />

LAAS Local Area Augmentation <strong>System</strong><br />

LAHSO Land And Hold Short Operations<br />

lb Pound<br />

LL Low Level<br />

LOS Loss of Separation<br />

LSB Least Significant Bit<br />

m meter (or “metre”), the SI metric system base unit <strong>for</strong> length<br />

MA Maneuver Advisory<br />

MAC Midair Collision<br />

MACA Midair Collision Avoidance<br />

MAS Managed Airspace<br />

MASPS <strong>Minimum</strong> <strong>Aviation</strong> <strong>System</strong> <strong>Per<strong>for</strong>mance</strong> <strong>Standards</strong><br />

MCP Mode Control Panel<br />

MFD Multi-Function Display<br />

MHz Mega Hertz<br />

mm Millimeter<br />

MOPS <strong>Minimum</strong> Operation <strong>Per<strong>for</strong>mance</strong> <strong>Standards</strong> (RTCA documents)<br />

mrad milliradian. 1 mrad = 0.001 radian<br />

MS Mode status<br />

MSL <strong>Minimum</strong> Signal Level<br />

MTL <strong>Minimum</strong> Trigger Level<br />

MTBF Mean-Time-Between-Failures<br />

MTR Military Training Route<br />

MTTF Mean Time To Failure<br />

MTTR Mean-Time To Restore<br />

N/A Not Applicable or No Change<br />

NAC Navigation Accuracy Category (sub “p” is <strong>for</strong> position and sub “v” is <strong>for</strong><br />

velocity)<br />

NAS National Airspace <strong>System</strong><br />

NASA National Aeronautics and Space Administration<br />

ND Navigation Display<br />

NIC Navigation Integrity Category<br />

NICBARO<br />

Barometric Altitude Integrity code<br />

NLR Nationaal Lucht- en Ruimtevaartlaboratorium - National Aerospace<br />

Laboratory in the Netherlands<br />

NM Nautical Mile<br />

NMAC Near Mid Air Collision<br />

NMPH Nautical Miles Per Hour<br />

NOTAM NOTice to AirMen<br />

NPA Non-Precision Approach<br />

NSE Navigation <strong>System</strong> Error<br />

NTSB National Transportation Safety Board<br />

NUC Navigation Uncertainty Category<br />

O/S Own Ship<br />

OC On Condition

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