(i) Air transport is the fastest and the costliest mode of transport. Commercial air transport is now one of the most prominent modes of overseas transport.
(ii) Air travel can be separated into two general classifications.
1. National/Domestic Flights; and
2. International flights. Flights operated from one point to another point within the same country is called domestic flights.
(iii) Flights operated from one point of one country to another point of another country is known as International Flights.
Advantages :
1. It provides a regular,convenient, efficient and quick service.
2. Perishable goods like fruits, vegetables, egg, meat, etc., can be transported quickly.
3. It does not require huge investment for construction and maintenance of track like railways.
4. They provide comfortable services for passengers and safety for their goods.
5. It can be used to move goods to areas, which are inaccessible to other means of transport.
6. It is very much helpful for flood or landslide and war rises to the occasion to save human life from danger.
Disadvantages of Air Transport : 
1. It is a very costly mode of transport.
2. Air craft are not quite suitable for carrying heavy loads and weights.
3. It is not dependable because of unfavorable weather which may disturb the air service suddenly.
4. The construction and maintenance of aerodromes involves a huge capital expenditure.
5. Every country controls the air space above its territory. Therefore, an aeroplane cannot fly over another country without obtaining its prior permission to concern authority.

(i) Way Bill:
(1) The way bill is an acknowledgement of receipt of goods for transport by the carrier.
(2) The carrier, accepting goods for transport, issues way bills in the name of the consignors or consignees.
(3) It serves as an evidence of the contract of transport. It is also a document of title of goods.
(ii) Railway Receipt:
(1) Railway Receipt is an acknowledgement of receipt of goods by the railway for transporting.
(2) It serves as a document of title of goods. It may be issued in the name of the consignor or consignee.
(3) Only on presentation of the railway receipt the railways will deliver the goods.
(iii) Bill of Lading :
(1) Bill of Lading is a document containing the terms and conditions of the contract of carriage.
(2) It is issued by the shipping company and signed by the captain of the ship.
(3) It acknowledges the receipt of the goods described in it on board the ship. It is also serves as an official receipt of goods. It is a document of title of goods.
(iv) Charter Party:
(1) When goods are to be consigned in large quantity, it is advantages to hire the whole or substantial part of the ship.
(2) The document through which this contract is made is known as 'Charter Party' which may be 'Voyage Charter' or 'Time Charter'.
(3) The person who hires the ship is known as 'Charter'. The charter party brings the vessel and crew under the control of the charters.
(v) Air Consignment Note:
(1) It is a document prepared by the consignor, which is handed over to the carrier of goods, while transporting goods through Airways. Air Consignment Note is made out in three original parts.
(2) One is signed by the consignor and marked for the carrier.
(3) The second is signed by both the consignor and the carrier and marked for the consignee and third is signed by the carrier and handed over to the consignor after the goods have been accepted.

1. Railways are well suited for carrying heavy and bulky goods over long distances.
2. It can provide long distance travel throughout the day and night with unbroken services.
3. It can provide better production and safety to the goods than motor transport. The goods generally carried in closed wagons are not exposed to sun, rain etc.
4. Though initial investment is large, in the long run the operating expenses will be very low in railways and it will prove a cheaper mode of transport. It requires less time than motor transport for carrying goods over long distance with greater speed.
5. It has regular schedule of timing and is available throughout the year. 
6. It provides unaffected services whether rainy or shinny weather conditions.

Inland Waterways comprise of rivers, canals, and lakes. It is also known as internal water transport. Rivers that are naturally navigable are called natural waterways. Canals and canalized rivers belong to the category of 'Artificial Waterways'. Generally small boats and steamers are operated on rivers to transport people and goods. Where rivers are deep enough, large ships can also play on them. Canals are manmade waterways, constructed for the twin purposes of navigation and irrigation.

The following are the advantages of inland Waterways:
1. It is considered as the cheapest mode of transport among the other modes of transport.
2. It carries goods smoothly due to the absence of shaking and jolting during transit.
3. It is eminently suitable for the carriage of fragile goods like glassware, earthware etc., without causing damage.
4. It is most suitable for heavy loads.
5. There is lesser pollution in water transport.
6. Initial investment on river services as well as expenditure on their maintenance is much lesser as compared to road and rail transport.