The supply vessel delivers needed equipment and goods to offshore platforms and other vessels at sea. It usually has a bow superstructure and a large work deck with low freeboard running aft.
Supply vessels link a port with offshore platforms and other vessels at sea. They deliver provisions, equipment and crews.
The great majority of supply vessels are equipped with azimuth thrusters and dynamic positioning systems. These allow them to maintain a stable, fixed position while delivering their cargo.
Choice will depend on dimensions, engine type and power, maneuverability, dynamic positioning systems, etc.