Businesses providing freight sea and coastal water transport move goods by cargo vessel between ports, either along the UK coastline or on international routes. They may operate scheduled services or arrange voyages for particular consignments, using vessels suited to the cargo and route. Sea transport is used for large volumes and heavy or oversized goods, as well as shipments travelling in containers. Typical services include the carriage of containerised freight, dry bulk such as grain or aggregates, liquid cargo, vehicles and other roll-on/roll-off loads, and break-bulk or project cargo. Operators may provide feeder services between smaller ports and larger shipping hubs, or arrange vessel capacity through chartering. Depending on the service, they can coordinate sailing schedules, cargo documentation and arrangements with ports and other transport providers; customs clearance, freight forwarding and road or rail delivery may be handled separately.