U.S. Builds New 160-meter Missile Tracking Ship to Support Pacific Missile Defense Tests.

The U.S. Missile Defense Agency (MDA) is advancing construction of a new 160-meter (525-foot) Missile Range Instrumentation Vessel (MRIV) to strengthen missile tracking, flight-test data collection, and interceptor testing across the Pacific Ocean. The ship will replace aging American missile-tracking vessels built in 1965 and 1970, modernizing critical maritime infrastructure used to evaluate advanced U.S. missile-defense capabilities.

The U.S. Navy's USNS Howard O. Lorenzen (T-AGM-25) missile range instrumentation ship supports missile tracking and flight-test missions. The U.S. Missile Defense Agency is preparing a new 160-meter (525-foot) vessel to strengthen missile tracking and interceptor testing across the Pacific Ocean. (Picture source: U.S. Coast Guard)

TOTE Services has confirmed that the first vessel has entered the construction-contract phase, with delivery scheduled for 2030. The new MRIV will provide mobile instrumentation capabilities supporting missile flight tests and interception evaluations across extensive Pacific test areas.

The new vessel will replace capabilities currently provided by Pacific Tracker and Pacific Collector, built in 1965 and 1970, respectively. Both ships currently support missile-range instrumentation missions for the U.S. government, despite being built during the Cold War. Their replacement is intended to keep specialized maritime assets available for demanding missile flight tests and interception exercises.

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Missile Range Instrumentation Vessels perform a critical role in evaluating defensive weapons by providing mobile observation and data-collection capabilities in remote ocean areas. These ships support monitoring missile trajectories, recording flight-test information, and assessing interception events. Their ability to operate far from fixed land-based tracking installations gives test authorities greater flexibility in positioning instrumentation assets along planned missile flight paths.

This capability is particularly relevant to U.S. missile-defense testing in the Pacific, where long-range ballistic missile and interceptor evaluations can extend across vast maritime areas. Tracking vessels complement land-based sensors and other instrumentation assets by collecting information from locations selected for individual tests. The resulting data help engineers and military authorities assess interceptor performance, validate system behavior, and identify technical issues before fielding or upgrading defensive weapons.

The approximately 160-meter-long (525-foot-long) MRIV will use the same basic hull design as the National Security Multi-Mission Vessel (NSMV), with approximately 70% overall commonality. According to TOTE Services, this design approach reduces construction risk and supports a more predictable production schedule by reusing an established ship design. It also provides a foundation for integrating the specialized equipment required for missile-range instrumentation missions.

Although the vessel's overall dimensions and design relationship have been disclosed, the latest announcement has not identified detailed specifications for its future missile-tracking radars, telemetry receivers, communications equipment, or instrumentation configuration. These mission systems will determine its precise tracking and data-collection capabilities. The MRIV is designed to support missile testing and evaluation, not operational missile interceptions.

The program reached a contractual milestone on October 7, 2026, when TOTE Services signed a vessel construction management agreement with the U.S. Maritime Administration (MARAD) and immediately executed a construction subcontract with Hanwha Philly Shipyard. The agreement follows the shipyard's selection earlier in 2026 and confirms construction of the first MRIV in a planned series. The available announcement does not establish firm construction orders for the additional vessels.

Hanwha Philly Shipyard, owned by South Korea's Hanwha Group, will construct the ship in Philadelphia using the production line, supply chain, and skilled workforce already established for the NSMV program. According to TOTE Services, that program helped expand the shipyard from a facility employing only a few dozen workers into an industrial operation with more than 2,000 production workers. The MRIV contract will extend this existing shipbuilding activity into a specialized national security mission.

TOTE Services will oversee construction management and currently manages and operates Pacific Tracker and Pacific Collector. Its experience with the existing instrumentation vessels provides operational and technical knowledge relevant to their replacements. The program also involves coordination between the U.S. Maritime Administration, the Department of War, and the Missile Defense Agency, linking civilian shipbuilding management with military testing requirements.

TOTE Services said its vessel construction management approach let the program advance design work, negotiate contract terms, and establish firm fixed pricing in less than three months, compared with a process that can take a year or longer under traditional government shipbuilding arrangements. The company also claims that this acquisition model can reduce costs by at least 50%, although this is a general company assessment rather than a separately verified cost reduction for the MRIV program.

Beyond shipbuilding, the program addresses a critical requirement in the U.S. missile-defense testing architecture. Interceptor development depends on accurately measuring missile trajectories, tracking engagement sequences, and collecting performance data under realistic test conditions. Instrumentation vessels positioned across Pacific test ranges can provide additional observation locations beyond those available from fixed land-based facilities, improving the flexibility of test planning and evaluation.

This requirement is becoming increasingly important as the United States develops missile-defense capabilities intended to counter more complex ballistic and hypersonic threats. Advanced interceptor tests require reliable measurements of flight behavior and interception events to assess whether defensive weapons meet their intended performance requirements. The new MRIV is expected to sustain these testing activities as older instrumentation vessels near the end of their service lives.

The vessel also has potential relevance to the broader U.S. Golden Dome missile-defense initiative, which seeks to establish a more integrated architecture for defending American territory against advanced missile threats. The MRIV is not an operational interceptor ship and will not itself provide missile-defense engagement capabilities. Instead, it would contribute indirectly by supporting the instrumentation and flight-testing infrastructure needed to develop, evaluate, and validate defensive technologies that could support future missile-defense architectures.

This distinction is operationally significant because even advanced missile-defense systems depend on reliable testing infrastructure before their capabilities can be demonstrated and fielded. Mobile instrumentation vessels support performance data collection, helping engineers identify technical limitations and assess interceptor behavior during complex flight tests. Replacing ships built in the 1960s and 1970s could improve long-term availability, sustainment, and flexibility, although measurable improvements in tracking performance will depend on the sensors and mission equipment ultimately installed.

With the first MRIV scheduled for delivery in 2030, the United States has taken a concrete step toward replacing aging maritime infrastructure supporting missile-defense development in the Pacific. The new vessel is intended to preserve the ability to conduct instrumented missile and interceptor tests, helping the Missile Defense Agency evaluate increasingly sophisticated defensive weapons while strengthening the maritime testing infrastructure essential to future U.S. missile-defense readiness.

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Written by Alain Servaes – Chief Editor, Army Recognition Group
Alain Servaes is a former infantry non-commissioned officer and the founder of Army Recognition. With over 20 years in defense journalism, he provides expert analysis on military equipment, NATO operations, and the global defense industry.