Sao , or Neptune XI , like many of the farther moons of Neptune , is named after one of the Nereids ; Sao was associated with sailing and is referred to as `` The rescuer '' or `` Safety '' . Sao , or Neptune XI , like many of the outer satellites of Neptune , is named after one of the Nereids ; Sao was associated with sailing and is referred to as `` The rescuer '' or `` Safety '' .