ComparisonRapidity maintains the highest speed

Continuous journey this mode is continuous over land water without loss of time and abruption

Accessibility Air transport has the unique ability to open up any region that is inaccessible by other means of transportation

Limitations Operating expenses : operating expenses are generally very high including the cost of air vehicles, traffic control systems, i.e. why freight charges are comparatively high.Capacity : weight carrying capacities of aircrafts are lowest among all modes and can not be used for heavy articles.Weather conditions : weather conditions greatly affect the operation of air transport for e.g. fog, snow

Structure and organization of air transportBy the legislatures of 26 national states, ICAO ,came into existence on 4 April 1947.By 1975 the original 26 states had grown to 131 member states.The most important international organization are:IATAICAAIAT

IATAInternational Airport transportation association : the role of this organization is to foster the interests of civil aviation, to provide a forum for industry views and to establish industry practices.ICAA International civil airports association was established to serve as a forum and focus of the views and interests of civil airport operators.IAT- An association of individuals and organizations with interests in civil aviation.

NAANational airports authorityCarved out of DGCAManaged by board of 4 full time members and 8 part time membersManages all domestic airports to a total of 116.

NAANational airports authorityDesign of aircraft, engines, airborne equipment and ground-based equipment affecting flight safetyConditions of manufacture and test of aircraft and equipmentMaintenance of aircraft and equipmentOperation of aircraft and equipmentLicensing ofpilots andmaintenance engineersLicensing of airports andnavigational aidsStandards forair traffic control

Manage air routesAirspace for domestic airportsAeronautical communicationsNavigational and radar servicesVisual aid and ground servicesAirport environmentCivil aviation training centreOrganization of search and rescue

ObjectivesEfficient air traffic services at domestic and international airports to ensure highest standards of air controlMaintenance and upkeep of domestic airports and civil air terminal at airports controlled by IAF and Indian navy and ensure quick and efficient passenger activities at domestic airports

IAAIDue to gradual increase in the size of the aircraft, passenger air traffic increase resulting in serious congestion and delays at airports.So under the chairmanship of J.R.D. Tata in 1967, IAAI was set up in April 1967.In 1972, plan was developed to construct four international airports Bombay, Calcutta, Delhi and Madras.

LimitationsInadequacy of funds provided in the five year planLack of integrated development of the aviation industry. While the national airliners, Air India, Indian Airlines and foreign airlines geared themselves to the traffic growth and expanded, IAAI could not keep in step with expansion Increased requirements of infrastructural facilities during the concentrated peak hour traffic due to bunching of flights. The magnitude of this imbalance is abnormally high.

AAISo, Airport Authority of India was formed in 1995 by merging NAA and IAAI.

To accelerate the integrated development

Expansion and modernization of the operational, terminal and cargo facilities at airports confirming the international standards.

AAI manages 11 international airports81 domestic25 civil air terminals at defense Airfields 8 custom airportsProvides Communication, Navigation and Surveillance systemPassenger facilities at international airportsCargo facilities