The Ohio-class ballistic missile submarine is the U.S. Navy's current sea-based strategic-deterrent SSBN class and the launch platform for Trident II D5/D5LE missiles. Four early Ohio hulls were converted to SSGNs, leaving 14 SSBNs in strategic service; Navy sources describe each remaining SSBN as carrying up to 20 missiles after New START tube deactivation and operating on alternating Blue and Gold crews for sustained patrol availability.
Ohio SSBN operations are built around continuous strategic-deterrent patrol availability. The class uses alternating Blue and Gold crews, long overhaul intervals, and logistics hatches intended to reduce time alongside between patrol cycles.
Navy sources describe average cycles of about 77 days at sea followed by 35 days in port for maintenance.
Each SSBN originally had 24 missile tubes; four have been permanently deactivated under New START.
Strategic Systems Programs says the class was extended from a 30-year design life to 42 years, with Ohio support planned through the final SSBN retirement window.
Public sources split the Ohio class into the 14 continuing ballistic-missile submarines and the first four hulls converted to guided-missile submarines after strategic-force reductions.
| Variant | Configuration | Designation notes |
|---|---|---|
| Trident I C4 early fit | Original strategic missile configuration | Strategic Systems Programs says the Ohio SSBN force initially employed Trident I C4 missiles as it began replacing the earlier 41 for Freedom submarines. Sources: SSP Ohio Class Sustainment |
| Trident II D5/D5LE fit | Current strategic missile configuration | The current SSBN branch carries Trident II D5 or D5LE missiles, with four missile tubes deactivated so each boat carries a maximum of 20 missiles. Sources: Fleet Ballistic Missile Submarines - SSBN, Trident II (D5) Missile | U.S. Navy Fact File |
 | Converted guided-missile and special-operations branch | The first four Ohio hulls were converted from SSBNs into conventional strike and special-operations submarines, leaving the remaining 14 boats in the strategic-deterrent SSBN force. Sources: Guided Missile Submarines - SSGN, SSP Ohio Class Sustainment |
The Ohio SSBN force is the current U.S. launch platform for the Trident II D5 and D5LE strategic weapon system.
| Launched item | Item type | Launch evidence |
|---|---|---|
 | Submarine-launched ballistic missile | The U.S. Navy identifies Trident II D5/D5LE as the Ohio-class SSBN strategic missile armament; its Trident fact file also describes D5LE service through the remaining Ohio-class service life. Sources: Fleet Ballistic Missile Submarines - SSBN, Trident II (D5) Missile | U.S. Navy Fact File |
The Ohio SSBN armament fit also includes torpedo tubes for submarine self-defense.
| Ammunition | Ammunition type | Firing evidence |
|---|---|---|
 | Heavyweight torpedo | The Navy lists Mk48 torpedoes in Ohio-class SSBN armament and separately describes the MK 48 as the heavyweight ASW and ASuW torpedo used by all submarine classes. Sources: Fleet Ballistic Missile Submarines - SSBN, MK 48 - Heavyweight Torpedo |
The strategic Ohio SSBNs remain distinct from the four converted Ohio SSGNs. The SSBN branch carries Trident II missiles for nuclear deterrence, while the SSGN branch replaced the first four boats' ballistic-missile mission with conventional cruise-missile and special-operations payloads.
Construction of USS Ohio began at General Dynamics Electric Boat in Groton, Connecticut, establishing the lead hull of the class.
Sources: USS Ohio (SSGN 726) - COMSUBPAC
USS Ohio entered Navy service at Groton as the lead boat of the class before shifting to Pacific strategic-deterrent patrol operations.
Sources: USS Ohio (SSGN 726) - COMSUBPAC
USS Ohio arrived at Naval Submarine Base Bangor as the first operational unit assigned to Commander, Submarine Group 9, before beginning its first strategic-deterrent patrol that October.
Sources: USS Ohio (SSGN 726) - COMSUBPAC
USS Wyoming, an Ohio-class SSBN, conducted a scheduled two-missile launch of unarmed Trident II D5LE missiles as DASO-31 after refueling overhaul.
Sources: USS Wyoming Successfully Tests Trident II D5LE Missiles
Strategic Systems Programs conducted four scheduled unarmed D5LE flight tests from a submerged Ohio-class SSBN off Florida during a September 17-21 event.
Sources: D5LE Readiness Launches
The Columbia-class submarine is the planned successor to the Ohio SSBN force. Navy material describes Columbia as the future sea-based strategic deterrent and says it must be ready for patrol no later than October 2030 to meet U.S. Strategic Command requirements.
