Document ID: chunk:federal_register_of_legislation:F2024L01024:front:0:p226
Version: federal_register_of_legislation:F2024L01024
Segment Type: other
Provision Reference: 
Character Range: 645830–649005

Systems ('AHRS').
Note: 7D002 does not apply to "source code" for the "use" of gimballed 'AHRS'.
Technical Note:
For the purposes of 7D002., 'AHRS' generally differ from Inertial Navigation Systems (INS) in that an 'AHRS' provides attitude and heading information and normally does not provide the acceleration, velocity and position information associated with an INS.
7. D. 003. Other "software" as follows:
a. "Software" specially designed or modified to improve the operational performance or reduce the navigational error of systems to the levels specified by 7A003, 7A004 or 7A008;
7. D. 003. b. "Source code" for hybrid integrated systems which improves the operational performance or reduces the navigational error of systems to the level specified by 7A003 or 7A008 by continuously combining heading data with any of the following:
1. Doppler radar or sonar velocity data;
2. "Satellite navigation system" reference data; or
3. Data from "Data‑Based Referenced Navigation" ("DBRN") systems;
7. D. 003. c. Not used;
7. D. 003. d. Not used;
                N.B.: For flight control "source code", see 7D004.
7. D. 003. e. Computer‑Aided‑Design (CAD) "software" specially designed for the "development" of "active flight control systems", helicopter multi‑axis fly‑by‑wire or fly‑by‑light controllers or helicopter "circulation-controlled anti‑torque or circulation‑controlled direction control systems", whose "technology" is specified by 7E004.b.1., 7E004.b.3. to 7E004.b.5., 7E004.b.7., 7E004.b.8., 7E004.c.1. or 7E004.c.2.
7. D. 004. "Source code" incorporating "development" "technology" specified by 7E004.a.2., 7E004.a.3., 7E004.a.5., 7E004.a.6. or 7E004.b., for any of the following:
a. Digital flight management systems for "total control of flight";
b. Integrated propulsion and flight control systems;
c. "Fly‑by‑wire systems" or "fly‑by‑light systems";
d. Fault‑tolerant or self‑reconfiguring "active flight control systems";
e. Not used;
f. Air data systems based on surface static data; or
g. Three dimensional displays.
Note: 7D004. does not apply to "source code" associated with common computer elements and utilities (e.g., input signal acquisition, output signal transmission, computer "program" and data loading, built‑in test, task scheduling mechanisms) not providing a specific flight control system function.
7. D. 005. "Software" specially designed to decrypt "satellite navigation system" ranging code designed for government use.
7. D. 101. "Software" specially designed or modified for the "use" of equipment specified by 7A001 to 7A006, 7A101 to 7A106, 7A115, 7A116.a., 7A116.b., 7B001, 7B002, 7B003, 7B102 or 7B103.
7. D. 102. Integration "software" as follows:
a. Integration "software" for the equipment specified by 7A103.b.;
7. D. 102. b. Integration "software" specially designed for the equipment specified by 7A003 or 7A103.a.
c. Integration "software" designed or modified for the equipment specified by 7A103.c.
Note: A common form of integration "software" employs Kalman filtering.
7. D. 103 "Software" specially designed for modelling or simulation of the "guidance sets" specified by 7A117 or for their design integration with