Fact-checked by Grok 2 weeks ago

C. Donald Bateman

C. Donald Bateman (March 8, 1932 – May 21, 2023) was a Canadian-born electrical and inventor best known for developing the (GPWS), a alert device that dramatically reduced (CFIT) accidents by providing pilots with audible and visual warnings of imminent ground collisions. Working primarily at and its predecessor companies for over five decades until his retirement in 2016, Bateman's innovations, including subsequent enhancements like the Enhanced GPWS (EGPWS) incorporating terrain databases and detection, have been installed on over 65,000 worldwide and are credited with saving thousands of lives by preventing preventable crashes. Born in Saskatoon, Saskatchewan, Canada, to a watch-repairing father and homemaker mother, Bateman earned a degree in electrical engineering from the University of Saskatchewan in 1956 before joining Boeing briefly and then a predecessor to Honeywell in 1960, where he focused on flight safety avionics amid a wave of 1960s airline disasters. His GPWS, patented in 1975 (U.S. Patent No. 3,922,637) after development starting in the late 1960s, used radio altimeter data to issue urgent commands like "Pull Up!" or "Terrain!," leading the Federal Aviation Administration to mandate its installation on large commercial jets beginning in 1974—a requirement later expanded globally. Bateman's later work on EGPWS in the 1990s integrated GPS and digital mapping for predictive alerts, further slashing CFIT incidents; for instance, such accidents dropped from 27 events causing 2,237 deaths between 1991 and 2000 to just 6 events with 229 deaths from 2011 to 2020. Bateman's contributions earned him prestigious honors, including induction into the in 2005, the National Medal of Technology and Innovation from President in 2011, and enshrinement in the in 2024, recognizing his leadership in engineering teams that patented numerous safety technologies. He passed away in , from complications of at age 91, leaving a legacy as a pivotal figure in modern whose devices continue to protect passengers daily.

Early life and education

Childhood and family

C. Donald Bateman was born on March 8, 1932, in , , . His father, George William Bateman, worked as a watch repairer, while his mother, Gladys Bateman, served as a homemaker, reflecting the modest circumstances of a typical family in the region. The family experienced upheaval when his parents divorced during his early years, leading Bateman to divide his time between his father's household in and his mother's in . Bateman's childhood unfolded in the rural expanses of , including time spent on a farm, which instilled a sense of practicality amid the province's wide-open prairies. At age eight, he witnessed a between two visible from his schoolroom window in , an event that profoundly impacted him; he and a friend later bicycled to the crash site to investigate the wreckage, igniting his early fascination with mechanics and safety. As a teenager, Bateman developed a keen interest in technology through ham radio communications, a hobby that honed his technical skills and persisted as a lifelong passion. In the late 1950s, following his education in , Bateman relocated to the , settling in to pursue opportunities in engineering. This move marked the transition from his formative years in to a professional path in American aerospace.

University studies

C. Donald Bateman attended the in , , where he pursued a degree in . He graduated with a in 1956, having completed a curriculum focused on electrical principles, circuit design, and emerging technologies in electronics. During his time at the university, Bateman developed a strong foundation in , which equipped him with the technical skills essential for his later work on aircraft instrumentation. While specific projects from his academic career are not widely documented, his education emphasized practical applications of electronics, aligning with the interdisciplinary demands of aviation technology. This background directly informed his subsequent innovations in flight safety systems by providing expertise in sensor integration and warning mechanisms.

Professional career

Early employment

Following his graduation from the University of Saskatchewan with a degree in electrical engineering in 1956, C. Donald Bateman joined in , in 1958 as an electrical engineer focused on avionics systems. There, he contributed to the development of electronics for the Boeing 707 jetliner, gaining foundational experience in aircraft instrumentation during the early when safety concerns around were emerging but not yet addressed by dedicated warning technologies. In 1960, after less than two years at , Bateman moved to United Control Corporation, a Seattle-based electronics firm founded by former Boeing engineers, where he took on responsibilities in designing early components. At the small company, typically employing fewer than 10 engineers on safety-related projects, Bateman assembled a team to tackle challenges in flight instrumentation, such as improving pilot amid rising incidents of accidents due to inadequate detection in low-visibility conditions. This work involved prototyping basic warning and control systems, honing his expertise in integrating sensors with displays under resource constraints typical of a startup-like environment. United Control Corporation underwent multiple ownership changes in the ensuing years, eventually becoming part of Sundstrand and later before integrating into , which significantly shaped Bateman's career by providing a larger platform for his avionics innovations while retaining his focus on systems. This transition in the late allowed Bateman to continue his trajectory in electronics without interruption, building toward decades of contributions at the acquiring entity.

Work at Honeywell

C. Donald Bateman joined United Control Corporation in , in 1960, after a brief stint at , bringing foundational experience in aircraft electronics to the small firm founded by former engineers. The company, initially focused on aviation electronics like thermal switches, was acquired by in 1967 and renamed Sundstrand Data Control, where Bateman continued advancing flight safety technologies amid growing industry demands in the 1960s and 1970s; the firm later relocated to . In 1993, acquired Sundstrand Data Control, integrating it into its division, and following the 1999 merger of with Inc., the operation became part of International, where Bateman's role expanded significantly. He progressed to lead engineering efforts in flight safety , eventually serving as of Flight Safety , a position he held for much of his later career, overseeing multidisciplinary teams dedicated to . 's corporate structure and resources, including dedicated R&D facilities in Redmond, fostered Bateman's work from the 1960s through the 2010s, enabling collaborations with engineers like Thea Feyereisen and supporting iterative advancements in safety systems amid evolving regulatory and technological landscapes. Bateman retired from Honeywell on July 21, 2016, after more than 50 years in the aviation industry, marking the end of a tenure that spanned multiple corporate transformations and technological eras. In the years immediately following his retirement, he remained connected to discussions through occasional consultations and reflections on industry progress, though he largely stepped back from active engineering roles.

Contributions to aviation safety

Ground Proximity Warning System (GPWS)

The Ground Proximity Warning System (GPWS) was developed by C. Donald Bateman in the late 1960s while he served as an engineer at Honeywell Aerospace, directly addressing the rising incidence of controlled flight into terrain (CFIT) accidents, which were the leading cause of fatal commercial aviation crashes at the time, accounting for approximately one such incident per month worldwide. Motivated by events like the 1971 Alaska Airlines Flight 1866 CFIT crash, Bateman's team focused on creating an automated cockpit alert system to provide pilots with timely warnings during inadvertent descents. At its core, the GPWS integrates inputs from the aircraft's radio altimeter, which measures height above the using signals, the vertical speed indicator to track descent rates, and configuration data such as flap extension and status to contextualize the aircraft's approach phase. These components enable the system to monitor for excessive sink rates relative to altitude (Mode 1), rapid closure (Mode 2), or unsafe descent profiles during landing (Mode 4), triggering aural alerts like "sink rate" or "pull up" when thresholds are exceeded, typically providing about 15 seconds of warning before potential impact. This analog computing approach prioritized reactive detection of immediate hazards beneath and ahead of the aircraft, without relying on forward-looking mapping. Bateman's key contribution to the system is detailed in U.S. Patent 3,922,637, filed in 1974 and granted on November 25, 1975, titled "Aircraft Landing Approach ." The patent describes a for a minimum safe altitude envelope during approach using radio altitude signals and descent rate data, activating a 15-second advisory warning if the falls below this threshold, thereby enhancing pilot awareness in low-visibility conditions. Initial adoption of GPWS began voluntarily among major airlines in the early , with widespread implementation accelerating after the U.S. (FAA) mandated its installation on all large turbine-powered transport aircraft under 14 CFR Part 121 operations effective December 1974. This regulatory push, prompted by mounting CFIT data, led to a significant reduction in such incidents; early post-adoption analyses indicated a 30-50% drop in CFIT accidents for equipped fleets compared to pre-1974 rates, transforming a once-prevalent hazard into a rarer event.

Enhanced Ground Proximity Warning System (EGPWS)

The Enhanced Ground Proximity Warning System (EGPWS) represents a significant evolution of the original (GPWS), building on its foundational reactive alerts by integrating advanced predictive capabilities during the under the leadership of C. Donald Bateman at (formerly ). Developed to address limitations in detecting rising terrain and forward hazards, EGPWS incorporated (GPS) technology for precise aircraft positioning, digital terrain databases covering global elevations and obstacles, and sophisticated predictive algorithms that forecast potential conflicts based on flight path and speed. These enhancements allowed the system to provide terrain awareness and warning information (TAWS) up to 40-60 seconds in advance, enabling pilots to take corrective action before imminent danger. Key technical advancements in EGPWS include multiple TAWS modes that expand beyond basic GPWS functions, such as Mode 5 for excessive closure rate and Mode 6 for excessive descent after takeoff or climb. The system's look-ahead functionality scans up to approximately 5 miles ahead and a laterally, using GPS-derived position data cross-referenced with high-resolution maps to generate aural alerts like "Caution, " and visual displays on instruments. Predictive algorithms compute closure rates and flight path projections in , alerting crews to hazards in diverse environments, from mountainous regions to urban obstacles, thereby improving during . This integration of geospatial data and computational forecasting marked a shift from reactive to proactive avoidance. The (FAA) certified EGPWS systems in the late 1990s, culminating in a 2000 rulemaking that mandated TAWS installation—effectively EGPWS—for most commercial aircraft with 10 or more passenger seats under Parts 121 and 135 operations, with compliance deadlines extending to 2005 for existing fleets. This requirement accelerated widespread adoption, with over 20,000 aircraft equipped by the early 2000s, driven by evidence of its effectiveness in reducing (CFIT) accidents. Post-mandate, global CFIT rates in equipped fleets dropped dramatically, approaching zero in some operator groups, as demonstrated in incidents where EGPWS alerts averted collisions in challenging terrains like the and Andean highlands. For instance, in varied international operations, the system's forward-looking warnings have credited with preventing numerous near-misses by providing timely interventions in low-visibility approaches over rugged landscapes.

Other safety innovations

Bateman contributed to the development of (HUD) systems, which project critical flight information onto the to enhance pilot without requiring them to look away from the external view. These systems, covered under his portfolio of over 40 U.S. patents related to , allow pilots to monitor altitude, speed, and data superimposed on the forward view, reducing the risk of disorientation during critical flight phases. He also advanced auto-throttle and speed systems designed to automatically adjust engine and maintain optimal airspeeds, preventing conditions or stalls that could lead to loss of . These innovations integrate with flight computers to provide precise speed regulation, particularly during takeoff, , and turbulent conditions, thereby minimizing pilot workload and enhancing overall flight stability. Bateman's work on the STALLPROTECTION system introduced automatic recovery mechanisms from stall conditions, alerting pilots to impending stalls and initiating corrective actions such as nose-down commands or thrust adjustments. This system builds on stall-warning technologies to actively intervene, significantly reducing the incidence of stall-related accidents by ensuring timely recovery even in high-stress scenarios. In addition, he developed detection and warning systems, encompassing both reactive variants that respond to immediate changes in wind velocity and predictive ones that forecast hazardous shear ahead using onboard sensors and weather data. These systems provide audible and visual alerts to pilots, enabling evasive maneuvers during takeoff or landing in microburst conditions, and have been integrated into modern to avert weather-induced crashes.

Awards and honors

National and governmental awards

In recognition of his pioneering work in , C. Donald Bateman received the National Medal of Technology and Innovation from President in 2011. This prestigious award, the highest honor for technological achievement bestowed by the government, acknowledged Bateman's development and advocacy of critical flight-safety sensors, including the (GPWS) and Enhanced Ground Proximity Warning System (EGPWS), which have prevented thousands of accidents worldwide. Bateman's contributions extended to influencing federal aviation standards, as his innovations were mandated by the (FAA); for instance, GPWS became required on commercial aircraft in 1974, and EGPWS in larger jets by 2002, significantly reducing controlled-flight-into-terrain incidents. These advancements underscored his national impact, leading to further governmental recognition. Posthumously, following his death in 2023, Bateman was inducted into the in 2024 as part of the Class of 2024. This enshrinement by the , which honors individuals for extraordinary contributions to aviation, highlighted his lifelong dedication to enhancing aircraft safety through engineering innovations that saved countless lives.

Industry and academic recognitions

Bateman's contributions to earned him significant recognition from industry and academic bodies. In 2001, he received the Industrial Research Institute Achievement Award for his innovative work on ground proximity warning systems, highlighting his role in advancing technological innovation within the engineering community. His induction into the in 2005 acknowledged his invention of the (), which has substantially reduced accidents worldwide. In 2007, the Alumni Association honored him with its Alumni Achievement Award, recognizing his distinguished career as a graduate in from the institution. In 1996, Bateman was awarded the Cumberbatch Trophy by the Guild of Air Pilots and Air Navigators (GAPAN) for his major personal contributions to improving international air safety through pioneering avionics technologies. In 2013, Bateman received the Philip J. Klass Lifetime Achievement Award from Aviation Week & Space Technology for his lifelong contributions to aviation safety innovations. Further affirming his impact, he received the Elmer A. Sperry Award in 2013 from the Board of Award Trustees, comprising the American Institute of Aeronautics and Astronautics, the American Society of Mechanical Engineers, the Institute of Electrical and Electronics Engineers, the Society of Automotive Engineers, and the Society of Naval Architects and Marine Engineers, for advancing the art of transportation via enhanced flight safety systems. These honors, culminating in the National Medal of Technology and Innovation, underscore his enduring influence on aviation engineering.

Patents

Overview of inventions

C. Donald Bateman amassed a substantial patent portfolio comprising over 40 U.S. patents and 80 foreign patents, centered primarily on advancements in avoidance, , and safety systems. These inventions addressed critical risks in , such as and low-altitude excursions, by integrating sensors, computational algorithms, and warning mechanisms into technologies. His work at , spanning decades, emphasized practical, life-saving innovations that enhanced pilot without overwhelming flight operations. Bateman's patenting activity began in the early 1970s, with early filings related to head-up displays and , and continued through the 2010s, including later developments in detection and low-airspeed alerts. The period of peak innovation occurred during the 1970s rollout of the (GPWS) and the 1990s advancement to the Enhanced Ground Proximity Warning System (EGPWS), reflecting his sustained focus on evolving threats identified through accident data analysis. This timeline underscores his career-long commitment to iterative improvements in reliability. The economic significance of Bateman's inventions is evident in the commercial success of systems like GPWS and EGPWS, which have generated nearly $1 billion in revenue for through widespread adoption across commercial and business aviation fleets. With over 65,000 EGPWS units deployed globally, these technologies not only recouped development costs but also established as a leader in equipment. Bateman's patents have left a profound legacy by influencing the standardization of protocols, including FAA mandates for GPWS installation in 1974 and ICAO recommendations in 1979 that propelled its international adoption. This foundational work has contributed to a dramatic reduction in terrain-related accidents, embedding terrain awareness and warning systems as core requirements in modern aircraft certification and operations worldwide.

Key patented technologies

C. Donald Bateman's foundational patent for the (GPWS), US Patent 3,922,637 issued in 1975, introduced innovative techniques to prevent during landing approaches. The invention utilized a signal from an System combined with radio data to compute a minimum safe clearance altitude, incorporating a biased and scaled distance measurement to establish a descent slope—such as 750 feet at 3.5 nautical miles from the , tapering to zero at 0.5 miles. If the aircraft's actual altitude fell below this computed minimum, the system triggered an aural and visual alarm, with activation enabled only below a preset threshold like 750 feet to minimize false alerts. This approach addressed limitations in prior -based warnings by integrating positional data for more precise proximity detection. Building on GPWS, Bateman contributed to Enhanced GPWS (EGPWS) through patents like US Patent 6,092,009 issued in 2000, which enabled GPS-integrated mapping for predictive warnings. The system employed a digital database alongside GPS positioning to generate look-ahead alerts for obstacles and rising , providing pilots with advanced notice of potential conflicts up to several miles ahead, unlike the reactive nature of original GPWS. This innovation incorporated three-dimensional modeling to forecast aircraft flight paths against stored data, issuing escalating cautions and warnings based on closure rates and escape maneuvers. Such features significantly expanded in varied topographies, reducing nuisance alerts while enhancing proactive avoidance. Bateman's portfolio also included key patents for other safety technologies, such as US Patent 3,686,626 from 1972 for a (HUD) system that integrated critical flight data—like altitude and —directly into the pilot's forward view, minimizing head-down time during critical phases. For detection, US Patent 4,947,164 issued in 1990 described a flight path-responsive alerting system that monitored aircraft trajectory deviations against atmospheric shear conditions, using inertial and air data sensors to issue advisory or escape warnings tailored to takeoff or landing scenarios. Additionally, his work on auto-throttle systems, covered in patents like those for speed control mechanisms, automated thrust adjustments to maintain or , integrating with flight management computers to prevent stalls or overspeeds during automated operations. These inventions, developed during his tenure at , collectively advanced integration for safer flight envelopes. Bateman's patented technologies profoundly shaped aviation regulations, particularly the Federal Aviation Administration's (FAA) (TAWS) mandates. The original GPWS patent directly influenced the FAA's 1974 requirement for its installation on all large commercial transport aircraft under Part 121 operations, which correlated with a reduction in accidents. Subsequent EGPWS innovations underpinned the 2000 FAA rule mandating TAWS—essentially an advanced EGPWS variant—on turbine-powered aircraft with 10 or more passenger seats under Parts 121, 135, and 91, expanding coverage to smaller operations and incorporating GPS-based predictive alerts to further mitigate terrain risks. These requirements, driven by Bateman's inventions, have been credited with averting thousands of potential accidents globally.

References

  1. [1]
    C. Donald Bateman - National Inventors Hall of Fame®
    C. Donald Bateman invented the Ground Proximity Warning System (GPWS), one of a series of innovations he developed to dramatically improve aircraft safety.
  2. [2]
    Don Bateman, Who Kept Airplanes From Crashing, Dies at 91
    Jun 8, 2023 · Don Bateman, an engineer who invented a cockpit device that warns airplane pilots with colorful screen displays and dire audible alerts.
  3. [3]
    Remembering Don Bateman, Whose Inventions Save Lives
    Bateman saved lives by introducing groundbreaking technologies to help flight crews avoid preventable aviation accidents.Missing: C. | Show results with:C.
  4. [4]
    Don Bateman, a force in aviation safety, dies at 91
    May 31, 2023 · Charles Donald Bateman was born in Saskatoon, Saskatchewan, on March 8, 1932. His father repaired watches, and his mother was a homemaker ...
  5. [5]
    Don Bateman, Champion of Airline Safety, Dies at Age 91
    ### Summary of Don Bateman's Work on Aviation Safety Innovations
  6. [6]
    Don Bateman saved more lives than anyone in aviation history
    May 26, 2023 · Small in stature and ruddy-faced, Bateman was born in Saskatoon, Saskatchewan, and spent part of his childhood on a farm. In 1940, when he ...Missing: C. Donald
  7. [7]
    Don Bateman's Brainchild Still Saving Lives After 50 Years
    The incident left an indelible impression on eight-year-old Don, who would go on to a brilliant engineering career centered on improving flight safety.Missing: C. Donald
  8. [8]
    Don Bateman - Engineering and Technology History Wiki
    May 21, 2023 · Biography. Charles Donald Bateman was born on March 8th, 1932 in Saskatoon, SK, and graduated from the University of Saskatchewan in 1956.Missing: C. childhood
  9. [9]
    Charles Donald Bateman (1932-2023) | WikiTree FREE Family Tree
    Charles Donald "Don" Bateman, legendary avionics engineer, passed into eternity on May 21, 2023, in Bellevue, Washington, ending his suffering from Parkinson's ...
  10. [10]
    Redmond aviation engineer's lifelong work has saved thousands of ...
    Feb 4, 2012 · In 1958 he took a job with Boeing in Renton, where he worked on avionics for the 707. After less than two years, he left to join United Control, ...
  11. [11]
    GPWS Pioneer Don Bateman Passes Away - Simple Flying
    May 28, 2023 · About Don Bateman. Born in Saskatoon, Saskatchewan, Bateman studied at the University of Saskatchewan and graduated as an electrical engineer.Missing: projects honors
  12. [12]
    Thanks to This Man, Airplanes Don't Crash Into Mountains Anymore
    Aug 10, 2016 · Don Bateman's terrain mapping device has nearly eliminated the largest cause of death in jetliner accidents.
  13. [13]
    Rockwell Acquires Avionics Division of Sundstrand Corp. for $225 ...
    Jan 26, 1993 · History: Sundstrand acquired United Control in 1967 and renamed it Data Control; the corporation acquired Wulfsberg Electronics in 1984 and ...
  14. [14]
    Honeywell will move 200 engineering jobs from Redmond to Phoenix
    Feb 4, 2021 · United Control, which began by manufacturing thermal switches for airplane electronics, was acquired ... Bateman invented the “ground ...
  15. [15]
    [RTF] https://investor.honeywell.com/static-files/940bf2...
    1994. In 1993 the Company acquired the data control business of Sundstrand. Corporation (Data Controls) for $195 million in cash. The business had sales of.
  16. [16]
    Father of Enhanced Ground Proximity Warning System Don ...
    Jun 9, 2023 · He was 91. Bateman spent most of his career as chief engineer of flight safety avionics at Honeywell before retiring in July 2016. In 2005, he ...
  17. [17]
    Aircraft landing approach ground proximity warning system
    United States Patent Bateman 51 Nov. 25, 1975 AIRCRAFT LANDING APPROACH GROUND PROXIMITY WARNING SYSTEM Primary Examiner-Thomas B. Habecker Attorney, Agent, or ...
  18. [18]
    EGPWS: Look What It Can Do Now - Avionics International
    Nov 1, 2000 · The EGPWS offers look-ahead alerts, altitude callouts, and terrain display. It also provides a high-resolution terrain database for both on- and off-airport/ ...
  19. [19]
    [PDF] AC 23-18 - Federal Aviation Administration
    Jun 14, 2000 · The GPWS equipment was considered essential in helping the pilots of these airplanes to regain altitude quickly and avoid what could have been a ...
  20. [20]
    [PDF] Enhanced Ground Proximity Warning System (EGPWS) Pilot's Guide
    Mode 2 is based on Radio Altitude and on how rapidly Radio Altitude is decreasing (closure rate). Mode 2 exists in two forms, 2A and 2B. Mode 2A is active ...
  21. [21]
    Terrain Awareness and Warning System - Federal Register
    Mar 29, 2000 · The FAA has approved certain installations of this type of equipment, known as the enhanced ground proximity warning system (EGPWS). However ...
  22. [22]
    Time and again, EGPWS breaks the accident chain
    Jan 22, 2008 · And yet the man most responsible for the development of EGPWS, Honeywell chief engineer Don Bateman, is the first to admit the system's ...
  23. [23]
    C. Donald Bateman
    Bateman, a chief engineer in flight safety avionics at Honeywell, developed and championed critical flight-safety sensors, like ground proximity warning and ...
  24. [24]
    AN ENGINEER LOOKS AT INNOVATION - jstor
    Jul 25, 2025 · Donald C. Bateman ... avoidance systems, HUDs, speed control/auto throttle systems, stall warning systems, automatic flight control.
  25. [25]
    2010 Laureates- National Medal of Technology and Innovation
    Jun 22, 2016 · C. Donald Bateman shakes hand with President Barack Obama. C. Donald Bateman Honeywell. For developing and championing critical flight-safety ...
  26. [26]
    President Obama Presents the National Medals of Science ...
    Oct 21, 2011 · C. Donald Bateman (Redmond, WA) for developing and championing flight-safety sensors that are used in aircraft worldwide, including ground ...
  27. [27]
    Don Bateman | National Aviation Hall of Fame
    Served as chief engineer of flight safety avionics at Honeywell. Interested in learning more? Fill out the form to receive Don Bateman's full bio.Missing: 1958 707
  28. [28]
    The National Aviation Hall of Fame Announces the “Class of 2024”
    Oct 16, 2023 · This year's honorees include: (The late) Don Bateman – Aerospace engineer, revolutionized aviation safety by developing groundbreaking ...
  29. [29]
    https://www.tandfonline.com/doi/abs/10.1080/08956308.2001.11671437
  30. [30]
    Awards Past - Alumni and Friends | University of Saskatchewan
    The Alumni Achievement Awards are presented annually to USask graduates who advance the reputation of the University of Saskatchewan and the Alumni Association.Missing: scholarships | Show results with:scholarships
  31. [31]
    Cumberbatch Trophy for outstanding flight safety improvement
    The coveted Cumberbatch Trophy is awarded annually for outstanding contributions to flight safety. Qantas, the Australian Airline, is the only airline ever to ...Missing: Donald | Show results with:Donald
  32. [32]
    Honeywell's Don Bateman Named 2013 Recipient Of Elmer A ...
    Mar 4, 2014 · Bateman was the recipient of Aviation Week & Space Technology's lifetime achievement award in 2013 for his work with EGPWS, received the U.S. ...
  33. [33]
    Charles Donald Bateman Inventions, Patents and Patent Applications
    Patent number: 8949014 · Abstract: Systems and methods for improving the presentation of wake turbulence information. · Type: Grant · Filed: August 1, 2012 · Date ...
  34. [34]
    US6092009A - Aircraft terrain information system - Google Patents
    An object of the EGPWS is to provide the crew with a terrain awareness system which provides increased warning times to the pilot of an aircraft of a hazardous ...