What does ssv stand for in ssv normandy?

Could you please clarify the meaning behind the abbreviation "SSV" in the context of "SSV Normandy"? It seems to be a reference to a specific entity or concept, but I'm not entirely sure what it stands for. Is it a ship designation, a technical term, or perhaps a nickname? If it's related to a game, movie, or franchise, providing that context would be invaluable. Understanding the background and context of "SSV Normandy" would help me to better interpret the significance of "SSV" in this particular instance. Thank you for your assistance in clarifying this matter.