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Overview
L3Harris Technologies (NYSE: LHX) produces the Iver suite of autonomous underwater vehicles and, as of March 2026, holds a DIU Other Transaction Authority contract to deliver the Torpedo Tube Launch and Recovery (TTLR) system for US Navy submarines. This makes L3Harris the primary supplier for covert submarine-launched AUV capability — the ability to deploy and recover AUVs through standard torpedo tubes without a submarine ever surfacing.
Iver4 900 AUV
| Spec | Value |
|---|---|
| Length | ~2.5 meters |
| Diameter | 9-inch (Iver4 900 series) |
| Pressure housing | 300-meter-rated titanium and carbon fiber |
| Battery options | NiMH or lithium-ion (hot-swap capable) |
| Endurance (NiMH) | 40+ nautical miles |
| Endurance (Li-ion) | 80+ nautical miles |
| Depth rating | 300 meters |
The TTLR configuration introduces the first US Navy submarine- and aviation-approved lithium-ion battery for an AUV — enabling hot-swap for potentially continuous missions. Multiple charged packs can be staged aboard the submarine for sequential replacement between AUV sorties.
Torpedo Tube Launch and Recovery (TTLR)
The TTLR system deploys and retrieves Iver4 900 AUVs through standard submarine torpedo tubes. The significance: submarines can conduct forward AUV operations in contested undersea environments without surfacing, maintaining stealth throughout the mission cycle.
Validated mission types:
- Intelligence, surveillance, and reconnaissance (ISR)
- Mine detection
- Seabed warfare / seabed mapping
- Forward area sensor deployment
The system is validated for multiple classes of US Navy attack submarines and is described as delivering across allied navies as well.
Contract & Status
- Contract: DIU Other Transaction Authority (OTA), March 2026
- Contracting office: Defense Innovation Unit
- Status: Delivering to US Navy submarines (confirmed May 2026, Sea-Air-Space)
Strategic Context
The TTLR capability fills a critical gap: submarines are the most survivable naval platform in contested waters, but their AUV operations previously required surfacing or specialized external launch systems. Torpedo-tube compatibility means any Virginia-class or Seawolf-class attack submarine can carry and deploy AUVs as part of a standard load, without modification.
Combined with Anduril’s Dive-XL XLUUV operating at longer range, the picture is a layered undersea autonomous fleet: large XLUUVs operating independently at 1,000+ nm, and smaller TTLR-launched AUVs operating as forward scouts from submerged submarines.