the SBS
noun [ S ] uk/ˌes.biːˈes/ us/ˌes.biːˈes/
（英国皇家海军）舰艇特勤队（the Special Boat Servic 的缩写）
abbreviation for the Special Boat Service: a part of the British Navy that has been specially trained for secret or very dangerous military activities
Compare: the SAS