A modular riser section storage and handling system configured to be mounted on a deck of an offshore drilling vessel for storing and handling riser sections for use in offshore wellbore drilling activities, and configured to be lifted from the deck of the vessel to free deck space, the system comprising: - multiple riser section transport containers for transporting multiple riser sections from a shore to the deck of the offshore drilling vessel, each adapted for storing multiple riser sections and comprising a storage space enclosed by a bottom side, a first side, a second side, a first end a second end and a top side of the container, and each having a top entry opening for lifting and lowering the riser sections in and out of the transport container, wherein the transport containers are configured to be set up side to side in a storage configuration on the deck of the vessel, wherein the riser section transport containers each have a longitudinal axis extending from one end of the transport container to an opposite end of the transport container, and wherein the top entry opening extends parallel to the longitudinal axis between the opposite ends of the container, and wherein the top entry opening of the transport containers has a length larger than a length of the riser sections to be held in the transport container, to enable the riser sections to be lifted in and lowered in a lateral direction, i.e. substantially perpendicular to a longitudinal axis of the riser section, through the top entry opening, and to enable the riser sections to be stored in a horizontal direction by the container in the storage configuration, - a riser section handling station, adapted for handling riser sections, which handling station is configured to be set up side to side with one or two of the multiple riser section transport containers in the storage configuration; - an overhead crane adapted for lifting and lowering riser sections in the lateral direction in and out of transport container and an overhead crane control device for controlling the movement of the overhead crane; and - an overhead track, comprising multiple track sections, which overhead track is configured to moveably support the overhead crane; wherein the multiple riser section transport containers are configured to support at each end of the transport container, between the top entry opening and the ends of the transport container, the overhead track when in the storage configuration, to enable the overhead crane to travel above and along the multiple transport containers in the storage configuration and to move riser sections between the multiple transport containers and the riser section handling station. - multiple riser section transport containers for transporting multiple riser sections from a shore to the deck of the offshore drilling vessel, each adapted for storing multiple riser sections and comprising a storage space enclosed by a bottom side, a first side, a second side, a first end a second end and a top side of the container, and each having a top entry opening for lifting and lowering the riser sections in and out of the transport container, wherein the transport containers are configured to be set up side to side in a storage configuration on the deck of the vessel, wherein the riser section transport containers each have a longitudinal axis extending from one end of the transport container to an opposite end of the transport container, and wherein the top entry opening extends parallel to the longitudinal axis between the opposite ends of the container, and wherein the top entry opening of the transport containers has a length larger than a length of the riser sections to be held in the transport container, to enable the riser sections to be lifted in and lowered in a lateral direction, i.e. substantially perpendicular to a longitudinal axis of the riser section, through the top entry opening, and to enable the riser sections to be stored in a horizontal direction by the container in the storage configuration, wherein the riser section transport containers each have a longitudinal axis extending from one end of the transport container to an opposite end of the transport container, and wherein the top entry opening extends parallel to the longitudinal axis between the opposite ends of the container, and wherein the top entry opening of the transport containers has a length larger than a length of the riser sections to be held in the transport container, to enable the riser sections to be lifted in and lowered in a lateral direction, i.e. substantially perpendicular to a longitudinal axis of the riser section, through the top entry opening, and to enable the riser sections to be stored in a horizontal direction by the container in the storage configuration, - a riser section handling station, adapted for handling riser sections, which handling station is configured to be set up side to side with one or two of the multiple riser section transport containers in the storage configuration; - an overhead crane adapted for lifting and lowering riser sections in the lateral direction in and out of transport container and an overhead crane control device for controlling the movement of the overhead crane; and - an overhead track, comprising multiple track sections, which overhead track is configured to moveably support the overhead crane;