Within HELIOS
Which Threats Can HELIOS Realistically Stop?
A 60 kW-class ship laser is plausible against some drones and small craft, but much less proven against fast missiles or dense raids.
On this page
- Why small drones are the clearest target set
- Why missiles are a harder step up
- How raids and decoys stress the laser layer
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Introduction
A 60 kilowatt-class naval laser such as HELIOS sits at an important threshold in directed-energy warfare. It is powerful enough to pose a credible threat to many unmanned aerial vehicles (UAVs), small boats and exposed sensors, yet it remains far from a universal answer to every air and missile threat. The central question is not whether a 60 kW laser can destroy something. It is which targets it can destroy reliably, under operational conditions, before those targets complete their attack. Current evidence suggests that small drones are the clearest and most realistic target set, while fast anti-ship missiles and large saturation attacks remain far more demanding problems. The practical value of HELIOS therefore lies in expanding a ship’s defensive options against lower-cost threats rather than replacing conventional missiles and guns. [GAO+2Wikipedia]gao.govgao 23 106717Science & Tech Spotlight: Directed Energy Weapons25 May 2023 — Directed energy weapons—such as lasers—use energy fired at the speed of…
Which Threats Can HELIOS Realistically Stop?
HELIOS was developed as a 60 kW-class laser integrated into the US Navy’s combat system and is generally described as a weapon intended to counter unmanned aerial systems, fast attack craft and certain other short-range threats. Public reporting on Navy testing has repeatedly centred on drone engagements rather than missile interceptions, which is revealing in itself. [Wikipedia+2The War Zone]Wikipedia60 kilowatt high-energy…
The most realistic way to think about a laser weapon is not as a projectile but as a heat-delivery system. To achieve a destructive effect, enough energy must remain concentrated on a vulnerable spot for long enough to damage a control surface, blind a sensor, ignite material, or destroy critical electronics. That requirement creates a practical threat boundary. Some targets remain exposed to the beam long enough for damage to accumulate; others move so quickly or are so resilient that the engagement becomes much harder. [CIAO+2linkedin.com]ciaotest.cc.columbia.eduIn a thermal kill, the target is destroyed by a long dwell time of the laser and burning through…Read more…
Why Small Drones Are the Clearest Target Set
Small drones align closely with the strengths of a 60 kW-class laser.
Many unmanned aircraft rely on lightweight airframes, exposed sensors, fragile control systems and limited thermal protection. They often fly relatively slowly compared with missiles and may remain within line of sight for extended periods. These characteristics reduce the amount of energy and dwell time needed to achieve mission-killing damage. Research literature and defence analyses consistently identify drones among the most favourable targets for high-energy lasers because they are thin-skinned and vulnerable to concentrated heating. [Defence Science Review+2RTX]defencesciencereview.com.plpdf 216776 135052Defence Science ReviewDEFENCE SCIENCE REVIEWby A Karkadakattil · 2026 · Cited by 1 — Laser-based Directed Energy Weapons (DEWs) are parti…
Publicly released information from Navy and industry sources reinforces this point. HELIOS has been tested against unmanned aerial targets, and reporting in 2026 described a Navy-operated demonstration in which the system neutralised four drone threats during an at-sea counter-UAS exercise. While details remain limited, the emphasis on drone engagements reflects where confidence is currently highest. [The War Zone]twz.comuss preble used helios laser to zap four drones in expanding testingThe War ZoneUSS Preble Used HELIOS Laser To Zap Four Drones In…2 Feb 2026 — “The HELIOS weapon system successfully neutralized four dr…
For naval commanders, this matters because drones increasingly occupy an awkward economic niche. Using expensive interceptor missiles against inexpensive reconnaissance or attack drones can be financially unsustainable during prolonged operations. A laser offers a potentially low-cost engagement option for precisely this category of threat. [GAO]gao.govgao 23 106717Science & Tech Spotlight: Directed Energy Weapons25 May 2023 — Directed energy weapons—such as lasers—use energy fired at the speed of…
Why Missiles Are a Harder Step Up
The transition from drones to missiles is not merely a quantitative increase in difficulty. It is a different problem.
Anti-ship missiles typically fly much faster, often manoeuvre aggressively and are built to survive harsh aerodynamic and thermal conditions. The laser must detect, track and maintain a precise aim point while the target closes rapidly. Even small interruptions in beam quality or tracking can significantly reduce the energy delivered to the target. The US Navy’s own research efforts continue to focus heavily on improving tracking accuracy against high-speed manoeuvring targets, highlighting that this remains a central challenge. [Office of Naval Research]onr.navy.milOffice of Naval ResearchCounter Directed Energy Weapons and High Energy LasersThe intent is to increase accuracy in all weather condition…
Atmospheric effects are particularly important at sea. Humidity, salt aerosols, haze, turbulence and thermal blooming can scatter or distort the beam before it reaches the target. A missile engagement often demands more energy delivered at greater range and within a much shorter engagement window than a drone engagement. Any reduction in beam effectiveness therefore matters more. [Laser Wars+2The Strategist]laserwars.netLaser Wars Fog of War: The Biggest Challenge for Naval Laser WeaponsLaser WarsFog of War: The Biggest Challenge for Naval Laser WeaponsMay 22, 2025 — 22 May 2025 — Welcome to the literal fog of war, where…
This does not mean missiles are impossible laser targets. HELIOS is often described as having some missile-defence potential, and future laser systems in the 150–300 kW range are being explored specifically to improve performance against cruise missiles. However, the public evidence base for routine, operational missile kills by 60 kW-class naval lasers remains far thinner than for drone defence. [Wikipedia+2Reddit]Wikipedia60 kilowatt high-energy…
A useful rule of thumb is that a drone often gives the laser time to work; a missile tries to deny it that time.
How Raids and Decoys Stress the Laser Layer
Even when a laser can defeat an individual drone, large raids create a different challenge.
Unlike a missile battery that can launch several interceptors in rapid succession, a laser generally must engage targets one at a time. Each target requires detection, tracking, beam stabilisation and a period of dwell time before damage accumulates. If numerous drones arrive simultaneously, the laser’s engagement timeline can become a bottleneck. Analysts and technical discussions of laser warfare frequently identify saturation attacks as one of the hardest operational problems because the weapon cannot instantly destroy every target in a swarm. [linkedin.com+2linkedin.com]linkedin.compot to melt through it) means that in a high-saturation…Read more…
Decoys can worsen the situation. If a ship must spend precious seconds evaluating and engaging multiple low-value objects, the laser’s theoretical low cost per shot becomes less important than the available time before a genuine threat reaches weapon-release range. The challenge is not energy supply alone; it is engagement capacity.
The broader directed-energy field has increasingly explored high-power microwave and radio-frequency weapons for this reason. Systems such as THOR and recent British radio-frequency demonstrators have focused on defeating multiple drones at once by attacking electronics across a wider area rather than burning through one target at a time. Their emergence highlights a recognised limitation of laser-only solutions against dense swarms. [afrl.af.mil+2des.mod.uk]afrl.af.milarmy partners with air forces thor for base defenseArmy partners with Air Force's THOR for base defense23 Feb 2021 — THOR is a prototype directed energy weapon used to disable the electron…
The Real Boundary of a 60 kW Naval Laser
The most defensible assessment is that a 60 kW-class system occupies the lower end of practical hard-kill naval laser capability. It appears well matched to surveillance drones, many attack drones and some small craft, particularly when weather is favourable and engagement geometry allows sustained beam contact. Public testing and official descriptions support that role. [The War Zone+2Wikipedia]twz.comuss preble used helios laser to zap four drones in expanding testingThe War ZoneUSS Preble Used HELIOS Laser To Zap Four Drones In…2 Feb 2026 — “The HELIOS weapon system successfully neutralized four dr…
The same evidence points to a much less certain picture against high-speed anti-ship missiles, complex multi-axis raids and large swarms. Those scenarios demand longer ranges, shorter reaction times, more resilient targets and the ability to service many threats simultaneously. Physics, atmosphere and dwell-time requirements all become less forgiving. linkedin.com+3Office of Naval Research+3Laser Wars [onr.navy.mil]onr.navy.milOffice of Naval ResearchCounter Directed Energy Weapons and High Energy LasersThe intent is to increase accuracy in all weather condition…
Viewed in that light, HELIOS is best understood not as a replacement for naval missiles or guns but as a new defensive layer. Its greatest value lies in removing lower-end threats from the battlespace cheaply and quickly, preserving conventional weapons for the targets that remain beyond the practical boundary of a 60 kW laser. [GAO+2The War Zone]gao.govgao 23 106717Science & Tech Spotlight: Directed Energy Weapons25 May 2023 — Directed energy weapons—such as lasers—use energy fired at the speed of…
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Further Reading
Books and field guides related to Which Threats Can HELIOS Realistically Stop?. Use these as the next step if you want deeper reading beyond the article.
Fleet Tactics And Naval Operations, Third Edition
First published 2018. Subjects: Naval tactics.
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Endnotes
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Finally! Watch the US Navy's Laser Weapon in ActionThe Helios is the US Navy's first truly operational laser weapon with enough energy to...
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