Flotilla (noun)

1. A small fleet of boats or ships, especially one organized for naval or coastguard duties.
2. A group of small boats or ships traveling together for a particular purpose.

Origin:

Mid 17th century: from spanish, diminutive of flota "fleet", from latin fluitare "to float".

Examples:

1. The flotilla of fishing boats.
2. A flotilla of yachts.
3. The coast guard's flotilla of patrol boats.
4. Flotilla of pleasure boats.
5. A flotilla of ships carrying supplies to the troops.