Announce your research topic. You can start your introduction with a few sentences which announce the topic of your paper and give an indication of the kind of research questions you will be asking. This is a good way to introduce your readers to your topic and pique their interest.
Buying a used fleet vehicle usually means you get a car that's been well-maintained and kept up to date on scheduled maintenance. However, while fleet owners take care of their cars, the drivers often don't.
A fleet of ships is most often a group of vessels sailing together under one military commander or as part of the same privately owned company. In modern times, the term can refer to a group of motor vehicles and even aircraft.