An aviso (formerly also an adviso), a kind of dispatch boat or advice boat, survives particularly in the French navy. Dispatch boats were small boats and sometimes large ships tasked to carry dispatches from ship to ship or from ship to shore or in some cases from shore to shore The French Navy, officially the Marine nationale ( National Navy) and often called La Royale ( The Royal Navy) is the maritime arm
The Dictionnaire de la Marine Française 1788 – 1792 (by Nicolas-Charles Romme) describes avisos as "small boats designed to carry orders or advices".
Modern avisos have grown to become combat-capable ships, smaller in size than a corvette, but larger than patrol ships. A corvette is a small maneuverable lightly armed Warship, originally smaller than a Frigate and larger than a coastal patrol craft, although many A patrol boat is a small naval vessel generally designed for coastal defense duties They typically have roles in anti-submarine coastal defence. An anti-submarine weapon is any one of a range of devices that are intended to act against a submarine and its crew to destroy (sink the vessel or to destroy or reduce its capability