The "N" refers to nuclear propulsion, not necessarily nuclear weapons. An SSBN is capable of being armed with nuclear missiles while an SSGN is designed to carry up to 154 Tomahawk cruise missiles. SSN's are capable of carrying Tomahawks, but only a very limited number of tubes. The SSGN has 8 tubes that can be reconfigured to support Special Operations Forces in a variety of roles. | The "N" refers to nuclear propulsion, not necessarily nuclear weapons. An SSBN is capable of being armed with nuclear missiles while an SSGN is designed to carry up to 154 Tomahawk cruise missiles. SSN's are capable of carrying Tomahawks, but only a very limited number of tubes. The SSGN has 8 tubes that can be reconfigured to support Special Operations Forces in a variety of roles. |