Early naval covert insertion in the Napoleonic Wars

What is an early example of naval special operations or covert insertion?

Napoleonic-era Royal Navy and Royal Marine teams used small, shallow-draft craft to insert and recover agents on enemy shores.

Specialized British naval covert work is traced to the Napoleonic Wars. Selected sailors and Royal Marines used some of the Royal Navy's smallest craft to insert and recover agents from hostile shores. Retractable keels or similar arrangements reduced draft near the coast while preserving the stability needed in deeper water. The example connects later naval special warfare with an older combination of seamanship, purpose-built craft, and clandestine intelligence work.