A stowaway or clandestine traveller is a person who secretly boards a vehicle, such as a ship, an aircraft, a train, cargo truck or bus.[1]
Sometimes, the purpose is to get from one place to another without paying for transportation. In other cases, the goal is to enter another country without first obtaining a travel visa or other permission. Stowaways differ from people smuggling in that the stowaway needs to avoid detection by the truck driver, ship crew, and others responsible for the safe and secure operation of the transportation service.
Thousands of stowaways have travelled by sea or land over the last several centuries. A much smaller number of people have attempted to stowaway on aircraft. Many stowaways have died during the attempt, especially in cases of train surfing and wheel-well stowaway flights.