General Dynamics Electric Boat has shared a photo showing the first completed Virginia Payload Module (VPM) for the U.S. Navy’s Block V submarines, expanding strike capacity.
General Dynamics Electric Boat posted the first view of the future USS Arizona’s (SSGN-803) Virginia Payload Module (VPM) on Monday, September 14. The completed section is seen floating on a barge, presumably beginning transport towards final assembly at GD Electric Boat’s facility in Groton, Connecticut.
The USS Arizona will represent the first submarine in U.S. Navy inventory equipped with the VPM, despite being the second Block V boat to enter service, following the USS Oklahoma (SSN-802). She represents the first of 19 total hulls fitted with the VPM, with a total of 12 Block Vs and 7 Block VI hulls receiving the upgrade over the course of the next two decades. The sighting of the first fully constructed VPM marks a key milestone in returning and ensuring critical strike capabilities across the undersea fleet.
The VPM will give the USS Arizona a more than 3x increase in Vertical Launch Cell capacity over previous hulls, with up to 28 additional Tomahawk-sized missiles carried in four larger canisters housing seven missiles apiece. This increases the VLS missile allotment to 40 when accounting for the two Virginia Payload tubes carried in the bow with six missiles apiece. Alternatively, each canister can carry three Conventional Prompt Strike (CPS) hypersonic boost-glide weapons, with the Navy utilizing the same mounting systems for CPS present on the Zumwalt-class destroyers following their conversions.
Each of the 19 VPM-equipped submarines will be 83 feet longer than their sisters, with a completed VPM constituting roughly 184 out of 460 feet of total length. Each of these 19 submarines will retain upgrades administered to earlier blocks, including a new side-mounted sonar array first found with the construction of the Block V boats.
Modernizing Missile Capacity
Currently, the first four Ohio-class submarines make up most of the U.S. submarine fleet’s conventional VLS capacity, with each submarine converted to carry 154 Tomahawk land-attack cruise missiles in lieu of a complement of 16 Trident Submarine-Launched Ballistic Missiles in the early 2000s, letting the four boats dodge an early retirement. Consequently, a massive gap in conventional VLS capacity looms over the U.S. submarine fleet as each of the 40+ year-old converted Ohios begin to depart service.
The VPM-equipped Virginias will thus backfill the capacity left behind by the Ohios, distributing missile capacity better across an increased number of modern platforms, with the U.S. Navy receiving an overall increase in VLS cells available once all of the VPM-equipped submarines are in service. Despite this, it remains unclear when the USS Arizona and the rest of her larger sisters will begin to reach U.S. Navy hands, as only the first VPM module is complete and awaits assembly alongside the rest of the submarine’s key compartments.
VPM might also increase the flexibility of U.S. Navy attack submarines in the future, as the Navy increasingly seeks different types of munitions employed from submarine-mounted VLS tubes. In particular, Naval News has previously covered efforts to mount a submarine-launched variant of the AARGM-ER anti-radiation missile, bringing an explicit radar-hunting capability to U.S. submarines. Additionally, The War Zone reported on an effort to bring anti-air capabilities to submarines via a specific variant of the Navy Modular Missile (the Navy’s prospective next-generation interceptor), presumably meant to be utilized from undersea vertical launch systems.
Facts Only
* General Dynamics Electric Boat shared a photo of the first completed Virginia Payload Module (VPM) for U.S. Navy Block V submarines.
* The photo was posted on Monday, September 14.
* The completed section is seen floating on a barge.
* The transport is presumably toward final assembly at GD Electric Boat’s facility in Groton, Connecticut.
* The USS Arizona (SSGN-803) will receive the first VPM.
* This represents the first submarine in U.S. Navy inventory equipped with the VPM.
* The VPM will give the USS Arizona more than a 3x increase in Vertical Launch Cell capacity over previous hulls.
* The upgrade will allow for up to 28 additional Tomahawk-sized missiles in four larger canisters housing seven missiles apiece.
* This increases the VLS missile allotment to 40 when including the two Virginia Payload tubes with six missiles each.
* Each of the 19 VPM-equipped submarines will be 83 feet longer than their sisters.
* Each VPM-equipped submarine will retain upgrades from earlier blocks, including a new side-mounted sonar array.
* The first four Ohio-class submarines currently constitute most of the conventional VLS capacity in the U.S. submarine fleet.
Executive Summary
General Dynamics Electric Boat has shared a photograph of the first completed Virginia Payload Module (VPM) for the U.S. Navy’s Block V submarines, intended to increase strike capacity. This module was posted on Monday, September 14, showing the section floating on a barge, presumably en route to final assembly at GD Electric Boat's facility in Groton, Connecticut.
The USS Arizona will be the first submarine in U.S. Navy inventory to be equipped with the VPM, marking the first of 19 total hulls scheduled to receive it over the next two decades, including 12 Block Vs and 7 Block VI hulls. The VPM provides a greater than three-fold increase in Vertical Launch Cell capacity compared to previous hulls, allowing for up to 28 additional Tomahawk-sized missiles in four larger canisters housing seven missiles each. This increases the VLS missile allotment to 40 when accounting for the two Virginia Payload tubes carrying six missiles apiece.
The completed VPM sections will make each of the 19 VPM-equipped submarines 83 feet longer than their sisters, contributing roughly 184 out of 460 feet of total length. These vessels will also retain upgrades from earlier blocks, such as a new side-mounted sonar array installed with the Block V boats.
The deployment of the VPM aims to backfill missile capacity left by older submarines, specifically addressing the gap created as the first four Ohio-class submarines are slated for retirement. This process will distribute missile capacity across a larger number of modern platforms and provide potential future flexibility for attack submarines to utilize various types of munitions, including anti-radiation and anti-air capabilities. However, the exact timeline for when the USS Arizona and other sister ships will receive the full module remains unclear as only the first module is complete awaiting assembly.
Full Take
The narrative frames modernization as an incremental process—a slow, deliberate distribution of capability across multiple hulls rather than a single disruptive event for one vessel. The shift from solely relying on legacy platforms to distributing missile load suggests a systemic response to obsolescence; the VPM serves not just as an upgrade but as a mechanism to manage fleet-wide transition and ensure sustained strike reach despite inevitable platform attrition. The focus on backfilling capacity left by departing hulls implies that capability gaps are perceived as structural liabilities requiring physical solutions, rather than mere operational inconveniences.
The ambiguity regarding the timeline for the full deployment—the uncertainty about when the USS Arizona will receive the complete module—creates a tension between the concrete achievement (one module completed) and the abstract future (fleet-wide modernization). This juxtaposition forces an examination of institutional pacing: how does large-scale military hardware development reconcile tangible construction milestones with bureaucratic delays and logistical realities? The potential for increased flexibility in munitions, such as incorporating anti-radiation or anti-air systems into the VLS architecture, suggests a pattern where platform evolution drives technological adoption, pushing future doctrine beyond simple missile delivery.
The underlying implication is that capability expansion is less about singular victories and more about systemic resilience: ensuring that strike power remains relevant across an expanding inventory of platforms through layered upgrades. The question shifts from "what capability has been added?" to "how efficiently can this new architecture integrate across the entire fleet while managing inherent logistical uncertainty?" What external pressures—budgetary constraints, shipyard capacity, or strategic necessity—will ultimately determine the rate at which these physical milestones translate into operational reality?
Sentinel — Human
The text appears to be grounded in specific defense/naval reporting, using the factual details to construct an argument about strategic impact rather than purely presenting raw data.