A more thorough explanation:

Definition: Speaking a vessel refers to a pilot's offer of services in maritime law.

Example: When a ship enters a port, a pilot may offer their services to guide the ship safely to its destination. This offer is known as speaking a vessel.

Explanation: Speaking a vessel is a term used in maritime law to describe the act of a pilot offering their services to a ship entering a port. The pilot's job is to guide the ship safely through the port and to its destination. This is important because ports can be dangerous places, with many obstacles and hazards that can cause damage to the ship or harm to the crew. By speaking a vessel, the pilot is offering their expertise and experience to ensure the safe passage of the ship.