Lighting the Way

By: Col David S. Rainey

2024 LtCol Earl “Pete” Ellis Essay Contest Winner: First Place

Marines, missiles, MPF boats, and the path through PRC defenses in the Western Pacific

 

The onset of World War II saw U.S. naval forces experimenting with new technologies to mitigate territorial advantages held by the Imperial Japanese Armed Forces. As the campaign in the Pacific unfolded, U.S. Navy and Marine Corps elements found themselves operating beyond the expanses of the open ocean, closer to coastal areas. When warships were pushed to navigate inside confined waterways, the newly developed patrol torpedo (PT) boat emerged as an unexpectedly effective capability to support maritime operations. Fast, highly maneuverable, and relatively inexpensive to build, hundreds of PT boats were organized into squadrons and deployed across the Western Pacific. They proved especially useful during the Solomon Islands Campaign, engaging Imperial Japanese Navy warships attempting to transit the narrow channels of Iron Bottom Sound.1 With their elusive speed, considerable firepower, and seemingly unescapable quantity, PT boats disrupted Imperial Japanese Navy resupply and other maritime operations. Eight decades later, the People’s Republic of China (PRC) has emerged as the new competitor in the Western Pacific and seeks to capitalize on similar territorial advantages within the region. Given the ambiguity surrounding a potential conflict, U.S. naval forces may again need to leverage experimental capabilities to ensure freedom of maneuver in the Pacific.

The new era of conflict will require U.S. maritime forces to contend with traditional PRC warships and more obtrusive surface vessels. Limited means to predict the catalyst for hostilities will require U.S. forces to pull existing capabilities into the fight to achieve initial operating objectives. Small, fast, and flexible watercraft will be the key to bridging the gap between the activities of warships and vessels operating at the lower end of the spectrum of conflict. Fortunately, U.S. naval forces already possess the tools to build a capability to address emerging threats. Marine Corps stand-in forces (SIF), deployed throughout the Western Pacific, are well-postured to operate across the continuum of competition or conflict. The maritime pre-positioning force (MPF) utility boat (UB) is a small and versatile craft currently employed by the Military Sea-Lift Command. The Javelin missile, organic to designated Army and Marine Corps formations, can support offensive or defensive operations against various adversarial threats. Combining the attributes of these seemingly disparate resources will produce a uniquely suited capability to mitigate the challenges presented by intermediate PRC threats. Teams of SIF Marines, armed with Javelin missiles and employed aboard MPF-UBs, will provide the maritime component commander with a platform to disrupt PRC operations in contested waterways.

Within the U.S. Indo-Pacific Command (USINDOPACOM) area of responsibility, the PRC continues to develop and employ maritime technologies to achieve an asymmetric advantage over existing U.S. naval formations. The intricate web of anti-access/area denial capabilities is designed to deny entry and prevent freedom of maneuver throughout the first island chain (FIC). Missile boats, patrol boats, and other small watercraft present significant threats to all classes of friendly vessels attempting to transit the waters of the South China Sea (SCS). Their small size, low signature, and high speeds allow for rapid approaches to warships to penetrate minimum weapons engagement zones and operate inside defenses. The ambiguous nature of purported law enforcement or other non-military vessels strains the ability to discern intent, inhibiting the rapid engagement of prospective threats. Hefty procurement costs associated with existing and emerging U.S. anti-ship capabilities render their use against smaller PRC threats inefficient. The employment of a flexible naval asset capable of responding to threats across the spectrum of conflict will be essential to defeating coordinated layers of PRC maritime defenses. 

The Type 022 Houbei-class missile patrol boat is a pivotal element of the PLAN near-seas defense strategy. The low draft, top speed of 42 knots, and a combat radius of 250 km make these boats the ideal platform to conduct operations around PLA bases and occupied territories throughout the FIC. Armed with up to eight YJ-83 anti-ship cruise missiles (ASCM), they are capable of attacking ships at distances out to 200 km.2 When employed under the cover of PLA integrated air defense systems, they can extend their operating ranges and further reduce the availability of vital maritime terrain. They attack by converging on a target with multiple boats, engaging in swarm tactics to destroy a U.S. Navy warship or constrain its ability to maneuver. Defeating the presence and effect of Houbei-class missile boats will be critical to enable the successful execution of the U.S. maritime strategy in the Western Pacific.

Another layer of the PRC maritime defense is executed by the China Coast Guard (CCG). Deployed from coastal bases and other inshore locations, its primary function is to enforce maritime laws within China’s proclaimed territorial waters. The Jiangdao-class cutters, created from repurposed warships, allow for easy conversion from law enforcement operations to a surface warfare platform.3 The equipping of Zhongtao-class patrol boats with large-caliber machineguns and high-capacity water cannons further obfuscates their perceived threat level, complicating rules of engagement (ROE) and rules for use of force (RUF) decision making when responding to their activities.4 The pervasive presence of cutters and other patrol boats also represents a persistent PRC intelligence, surveillance, reconnaissance, and targeting (ISR-T) capability. To operate undetected and freely maneuver across the FIC, U.S. Naval forces must develop the means to counter CCG patrols and other ISR-T activities.

The third component of the PRC maritime defense strategy is the China Maritime Militia (CMM). Within the SCS, CMM vessels execute a variety of grey-zone tactics to enable the achievement of larger strategic objectives. Though not an official component of the PLA, they have been employed in conjunction with PLAN and CCG vessels to reinforce territorial claims during designated operations.5 Their firepower is limited, but crews are equipped with various small arms and the hulls of their boats are constructed using reinforced steel.6 This allows for the employment of aggressive tactics against civilian or military support vessels, as they engage in overt anti-access/area denial activities to deny foreign vessel operations in disputed waterways. CMM boats can also be outfitted with radars, navigation equipment, and communications to facilitate their employment as an ISR-T platform. Interdicting CMM operations will limit the disruption to sea lines of communication, providing U.S. warships the ability to operate unmolested inside the contested waters of the FIC.

Each echelon of PRC maritime defenses presents unique challenges to traditional naval operations in the USINDOPACOM area of responsibility. The preponderance of existing U.S. Navy capabilities in the Western Pacific are designed to engage PLAN warships or operate against high-level threats. Attempts to overcome the density and volume of lethality afforded by the Type 022 missile boats would quickly exhaust the countermeasures of the deepest operational magazines. Mitigating the pervasiveness of CCG activities to limit PRC maritime domain awareness will require the deployment of substantiative counter ISR-T capabilities. Once hostilities unfold, the ambiguous nature of CMM operations will demand a measured approach to the application of the ROE and RUF to manage the potential for escalation. Addressing intermediate threats across the spectrum of conflict will be essential to the success of U.S. naval forces operating within the web of PRC maritime defenses.

Marine Corps SIF are specifically designed to operate within contested areas, conducting sea-denial operations
to disrupt the maneuver of an adversary’s naval forces.7 Forward positioned within the FIC, they represent a foundational component of the U.S. naval strategy to mitigate the presence of PRC maritime threats. When provided with a maneuverable and low-signature watercraft, SIF Marines will be able to rapidly move about contested waters within a given area of operations. Their vessels must be fast, agile, and possess a shallow draft to allow for rapid ingress and egress of low-water areas. Crew-served weapons and other small arms will provide the organic force protection capabilities needed to ensure their survivability. A moderately ranged high-explosive projectile will offer the fire support required to neutralize or destroy smaller enemy surface vessels. Equipping SIF Marines with the requisite capabilities to deliberately shoot, rapidly move, and effectively communicate will enhance their ability to degrade intermediate PRC maritime threats in the Western Pacific.

Maritime pre-positioning force utility boats are one of the best assets to support transportation requirements within coastal areas. As a component of the Improved Naval Lighterage System, they are used by the Military Sea-Lift Command to move personnel and equipment during MPF operations. With a length of just over 41 feet and a beam of 14 feet, they have a very low profile and produce a limited radar signature during the conduct of operations. Two 660 horsepower diesel engines power a waterjet propulsion system, giving these boats significant maneuverability as they reach speeds of up to 41 knots.8 Their draft of just under three feet allows for easy navigation into and out of shallow water areas. A ramp positioned at the center of the bow enables the rapid discharge of up to 10 tons of cargo, 30 combat-loaded troops, or other materials directly onto a beach.9 The characteristics of the MPF-UB make it an ideal platform to support the maritime maneuver requirements for SIF Marines within the FIC.

The Javelin Close Combat Missile System (CCMS) is the primary anti-tank weapon for the Army and Marine Corps. It is a lightweight, man-portable, fire-and-forget missile that can easily be employed from a small vessel. In the Marine Corps, they are assigned to infantry units and employed by anti-tank missile gunners. The 8.4 kg high-explosive anti-tank warhead is autonomously delivered against targets operating at distances as far as 2,500 meters.10 The reusable command launch unit enables rapid target acquisition while also providing an enhanced daytime or infrared night vision surveillance capability. The Javelin possesses the characteristics to be the desired lethal surface-fires capability for SIF Marines conducting sea-denial operations inside the contested waterways.

Combining task-organized SIF elements, MPF-UBs, and the Javelin CCMS into a single platform will create a highly lethal capability to provide the maritime component the means to disrupt PRC operations across the spectrum of conflict. These new Marine light assault missile patrol (LAMP) boats will have the maneuverability and firepower needed to engage and neutralize intermediate adversary threats in coastal areas. Their speed will allow them to rapidly close with Houbei-class missile boats and then attack them with a volley of self-guided anti-tank missiles. Their ability to outmaneuver CCG cutters and other small craft will place them in a position to interdict maritime patrol operations or disrupt ISR-T activities inside the FIC. Marine crews armed with various small arms and crew-served weapons provide the flexibility needed to contact CMM vessels, discern their intent, and engage them if determined to be hostile. When effectively organized and widely employed within SCS, Marine LAMP Boats will be able to create opportunities for Navy warships to maneuver.

This concept is not without some disadvantages, which could impede its development and limit successful implementation. Training will be one of the primary limitations to inhibit the widespread deployment of LAMP Boats. Though infantry units are already organized with anti-tank missile gunners and machinegunners, coxswains, and navigators are not widely present in any current Marine Corps formation. Leveraging the knowledge and expertise of the Navy’s assault craft units for exercises and training can increase nautical proficiency, providing time to build capacity and mature an organic capability. Survivability is another considerable challenge within the LAMP boat concept. The MPF-UB’s relatively small size and aluminum construction will make them susceptible to deck guns, surface-to-surface missiles, or other large-caliber weapons. Crews must be prepared to maximize the MPF-UB’s speed and maneuverability to evade PLAN warships and avoid potential engagements. The final challenge to the successful employment of this concept will be the requirement for maintenance. As with other surface vessels, MPF-UBs rely on daily preventative maintenance checks and services and occasional higher-level repairs to remain operational. Littoral logistics battalions with engineer equipment mechanics or the expertise of mechanics of allies and partners will provide the technicians needed to service the MPF-UB’s two six-cylinder diesel engines. This will ensure vessels remain operational and can quickly return to the station following preventative maintenance or repairs. Mitigating the identified shortfalls will facilitate the successful employment of the LAMP boat concept while remining perceptive of other challenges during maritime operations in the FIC.

Despite the apparent challenges, the numerous advantages of the LAMP boat concept encourage the maritime component to pursue further development of this initiative. Cost is one of the primary benefits, given the limited fiscal investment required to facilitate the fielding of this platform. The price for an MPF-UB is approximately $1M and an Javelin CCMS is less than $250K for the full system; less than $100K when procuring the missile only.11 This is considerably cheaper than the estimated $3M for each Block II Harpoon missile, $2M for a Naval Strike Missile, and other high costs associated with individual ASCM systems.12 Versatility is another key advantage to the employment of LAMP boats, as they can support multiple warfighting functions. The low draft, high-payload capacity, and convenient bow ramp enable MPF-UBs to perform a variety of enabling tasks during patrols. They can easily be configured to support supply delivery, medical evacuation, or other logistics functions when not engaged in offensive operations. The most significant advantage of this concept is the ability to conduct operations across the spectrum of conflict. At the high end of the spectrum, the delivery of a volley of Javelin missiles provides a level of lethality commensurate with that of an ASCM. At the lower end of the spectrum, the ability to apply ROE/RUF considerations allows Lamp Boat crews to interrogate vessels conducting grey-zone activities and classify their status as friend or foe.

Should hostilities commence in USINDOPACOM area of responsibility, the defense in depth created by PRC anti-access/area denial capabilities has the potential to inhibit the successful entry and maneuver of U.S. naval forces. Houbei-class missile boats, CCG cutters, and CMM vessels present a variety of challenges to traditional naval operations and require a new approach for a successful campaign. Though ASCMs and other exquisite weapons systems will be essential in the fight against the PLAN, their expense and long development period could result in their untimely delivery for the prospective fight. The LAMP boat concept provides the maritime component commander with an immediately available, cost-effective, and highly lethal platform to address intermediate PRC threats within the FIC. The MPF-UB has the speed and maneuverability to keep up with Houbei-class missile boats, and the Javelin CCMS warhead is more than sufficient to neutralize the threat. They are versatile enough to interdict CCG cutters and other purported maritime law enforcement boats, disrupting PRC ISR-T activities and allowing U.S. vessels to operate more freely in the contested waterways. The LAMP boats can directly respond to CMM vessels attempting to disrupt sea lines of communication or engage in maritime surveillance, applying the appropriate level of force to neutralize their effect without concern for inadvertent escalation. The LAMP boat concept will provide the means to chart a path through echelons of mutually supporting PRC defenses, opening waterways in the SCS for U.S. warships to safely maneuver. 

>Col Rainey is currently assigned as the AC/S G-9 for Marine Corps Installations Command, following graduation from the National War College in June 2024. Before being promoted to Colonel, he served as a Military Police Officer and completed various assignments within FMF and supporting establishment organizations.

Notes

1. Edmund B. Hernandez, “Fifty Tons of Fury: Bring Back the Patrol Torpedo Boat,” Proceedings, September 2018, https://www.usni.org/magazines/proceedings/2018/september/fifty-tons-fury-bring-back-patrol-torpedo-boat#:
~:text=PT%20boat%20action%20during%20World%20War%20II%20is%20well%20documented.

2. Dr. Sam Goldsmith, Vampire, Vampire, Vampire: The PLA’s Anti-Ship Cruise Missile Threat to Australian and Allied Naval Operations (Canberra: Australian Strategic Policy Institute, 2022).

3. U.S. Department of Defense, Military and Security Developments Involving the People’s Republic of China 2023: Annual Report to Congress (Washington, DC: Office of the Secretary of Defense, 2023).

4. Caitlin Campbell and Ben Dolven, China-Philippines Tensions in the South China Sea, CRS Report for Congress IF12550 (Washington, DC: Congressional Research Service, 2023).

5. U.S. Department of Defense, Military and Security Developments Involving the People’s Republic of China 2019: Annual Report to Congress (Washington, DC: Office of the Secretary of Defense, 2019).

 

6. Military and Security Developments Involving the People’s Republic of China 2023.

7. Headquarters Marine Corps, A Concept for Stand-In Forces, (Washington, DC: December 2021).

8. Staff, “Assault Craft Unit (ACU) 1: About Us,” Navy.mil, n.d., https://www.surfpac.navy.mil/Ships/Assault-Craft-Unit-ACU-1.

9. Ibid. 

10. Headquarters Department of the Army, FM 3-22.37: Javelin-Close Combat Missile System, Medium (Washington, DC: August 2013).

11. Missile Defense Project, “FGM-148 Javelin,” Missile Threat, Center for Strategic and International Studies, March 21, 2022, last modified April 23, 2024, https://missilethreat.csis.org/missile/fgm-148-javelin.

12. Jack Montgomery, “The Navy Must Build More Missiles Now,” Proceedings, August 2013,
 https://www.usni.org/magazines/proceedings/
2023/august/navy-must-build-more-missiles-now.