Without witnesses or survivors, the mystery surrounding the fate of missing ships has inspired many items of nautical lores and the creation of paranormal zones such as the Bermuda Triangle.
Sudden disasters such as military strike, collision, rogue wave, or piracy could also prevent a crew from sending a distress call and reporting a location.
Among the many missing ships on the list are submarines, which have limited communication, and provide the crew almost no chance of survival if struck by disaster under water.
The advancement of radar technology by the end of World War II and today's Global Positioning System make it more likely that a distressed vessel will be located.
The search for these types of missing vessels is usually motivated by historical, legal or actuarial interests requiring the aid of government funding such as in the 2008 discovery of HMAS Sydney and Kormoran.