RegistrationAndFlag

{
    "port_of_registry": {
        "total_categories": 0,
        "items": [
            {
                "label": "string",
                "count": 0,
                "percentage": 0
            }
        ]
    },
    "vessel_flag": {
        "total_categories": 0,
        "items": [
            {
                "label": "string",
                "count": 0,
                "percentage": 0
            }
        ]
    }
}