Inter-System Shuttle
An Inter-System Shuttle is the smallest Royal Manticoran Merchant Marine ship chapter in The Royal Manticoran Navy: The Official Honor Harrington Fan Association, Inc.'. The minimum crew size is 2, of which one must be an officer. The officer must hold a Mate's license of at least Fourth Officer. A shuttle can have a maximum crew of 5 and can carry up to 2 passengers.
An inter-system shuttle is the civilian version of an RMN pinnace, so it is a temporary chapter depending on a parent (hypercapable) until/unless it can organize into something larger before its orders expire.
Honorverse
An Inter-System Shuttle is a non-hypercapable craft used to move people and small cargos within a star system.