Understanding the Functionality of Virtual Reality in Military Applications

Since the inception of virtual reality (VR), the U.S. military has played a pivotal role in advancing and implementing VR technologies. Alongside the entertainment sector, the military has driven significant breakthroughs in VR. This article explores how the military leverages virtual reality for diverse purposes, from training jet pilots to managing shipboard emergencies.

Virtual environments are highly effective for military use. When expertly crafted, they offer users a precise simulation of real-world scenarios in a secure, controlled setting. Military training, especially for pilots, can be costly and risky when conducted in real-life conditions. Although the upfront costs for VR equipment and software are high, they prove more economical over time compared to real-world training. Additionally, VR technology enhances safety in various military operations.

This is why the military showed keen interest when engineers started experimenting with head-mounted displays (HMDs). Both the Navy and the Air Force invested in early research to develop functional HMDs. Initially, these displays were connected to cameras rather than virtual environments. Engineers placed cameras on servo-controlled bases (platforms connected to motors that adjust their position through rotation or tilting).

By wearing the HMD, a user could direct the camera's focus simply by moving their head. An early use of this technology involved Bell Helicopter Company attaching an infrared camera to the underside of a helicopter. This allowed pilots to view the terrain below during nighttime flights, significantly improving safety during challenging landings.

Nowadays, VR technology in the military extends beyond training and safety improvements. It is also employed to evaluate military strategies and battlefield layouts. In the following section, we'll explore the different simulators frequently used in military training.

Flight Simulators

Among the earliest uses of VR technology, military vehicle simulations have proven to be the most effective. These simulators utilize advanced computer systems to mimic the performance and constraints of vehicles in a secure, stationary environment.

Flight simulators are arguably the most recognized training tools in the military. The Air Force, Army, and Navy all rely on these simulators to prepare pilots for various scenarios, such as combat flying, emergency recovery, and coordinating air support with ground troops.

Each branch utilizes a mix of military-developed and third-party hardware, leading to differences among flight simulators. This diversity can create challenges, such as simulated enemies not aligning in the same spatial coordinates for multiple pilots. Efforts are now focused on improving simulator networks to enable more effective joint training exercises.

Despite variations in design, most flight simulators share a common structure. They are mounted on either an electronic motion base or a hydraulic lift system, which responds to user inputs and simulation events. As the pilot maneuvers, the module moves accordingly, providing haptic feedback—physical sensations that enhance realism. A joystick with force-feedback is a prime example of such haptic technology.

Flight simulators range from fully enclosed modules to setups with multiple monitors covering the pilot's view. The goal is to replicate the cockpit layout and controls of real aircraft. However, since cockpit designs vary widely, no single simulator can perfectly represent every vehicle. Some training facilities invest in multiple simulators for accuracy, while others prioritize cost-efficiency by using a single model.

Next, we'll explore VR simulators designed for ground vehicles and submarines.

On the Ground and In the Water

Ground Vehicle Simulators

While not as prominent as flight simulators, VR simulators for ground vehicles play a crucial role in the military's strategy. They are integral to the Future Combat System (FCS), which forms the backbone of the armed forces' future operations. The FCS combines a networked battle command system with advanced vehicles and weaponry. Its simulators are designed to interconnect, enabling complex training exercises with participants fulfilling diverse roles.

The FCS simulators feature three computer screens and a console equipped with dual joystick controllers. These modules can replicate various ground vehicles, such as non-line-of-sight mortar carriers, reconnaissance units, and infantry transport vehicles.

The Army employs specialized devices to train soldiers in operating vehicles like tanks and the heavily-armored Stryker. Some of these devices closely resemble flight simulators. They not only mimic the handling and performance of the actual vehicles but also simulate diverse environments. Trainees can experience how the vehicles perform in harsh weather or challenging terrains. Networked simulators also enable participation in intricate war game scenarios.

While simulators can be costly, with the latest Stryker simulator priced at around $800,000 per unit, the expense is justified when compared to the millions spent on actual vehicles. Additionally, simulators ensure the safety of soldiers during training.

Modern training facilities increasingly use simulators to prepare soldiers for urban combat tactics. Unlike traditional battlefields, today's conflicts often occur in cities and towns. Simulators allow the military to train soldiers in navigating and operating effectively in urban settings without the need for physical mock environments.

Water Vehicle Simulators

Navy submarine simulators differ significantly from other military vehicle simulators. Since submarines lack windows, lifelike visuals are unnecessary. Instead, these simulators focus on delivering accurate instrument readings as crews navigate simulated environments. While some submarine simulators are stationary, which can reduce immersion, others are equipped with pneumatic arms that tilt the module, mimicking diving or surfacing movements.

Another remarkable Naval use of virtual environments is the virtual bridge. The Navigation, Seamanship, and Ship-Handling Trainer (NSST) precisely replicates the bridge of a large Navy vessel. Featuring numerous computer monitors—some acting as windows and others as ship controls—this simulator allows bridge teams to train together, enhancing teamwork and ship-handling skills through various scenarios.

Next, we'll explore how the military employs virtual environments to train infantry soldiers.

Virtual Boot Camp

Beyond training soldiers to operate complex military vehicles, virtual environments have proven useful in other areas. Collaborations between military officials and video game developers have led to the creation of immersive simulations that prepare soldiers for diverse combat scenarios. Some of these simulations are even available to the public through popular commercial video games.

As part of the Future Combat Systems (FCS) initiative, Pandemic Studios developed an advanced training simulation. Soldiers can practice small-unit tactics in a virtual urban setting using an Xbox console. Players assume the role of a team leader tasked with completing specific objectives. A modified version of this simulation was later released commercially as the game "Full Spectrum Warrior."

Other notable simulations include "America's Army" and "Guard Force." Recognizing that many recruits are familiar with video games, the military leverages these tools to engage and train them in a safe, virtual environment. Some programs are web-based, enabling recruits to interact with seasoned soldiers and learn practical techniques for real-world situations.

Certain VR training systems go beyond traditional console games. Although not widespread, some military bases feature advanced virtual reality setups for in-depth training. These setups include CAVE systems, head-mounted displays, and treadmills to enhance learning and skill development. Due to their high cost and maintenance, such facilities are rare, but pilot programs have shown promising results, suggesting a future where soldiers spend more time engaging in virtual combat scenarios.

One example is the Virtual Squad Training System (VSTS) at Schofield Barracks in Hawaii. This facility recently introduced a new wireless, wearable system that enables soldiers to move freely in a virtual environment. The system includes the following components:

Developed by Quantum3D, Inc., these systems are tailored for military use. They operate on specialized software, including the BattleMaster IOS, allowing soldiers to train with simulated weapons like the M4, M165, or M249 in a virtual combat setting.

Military leaders emphasize that virtual training does not replace physical drills. While virtual environments are valuable tools, soldiers must still undergo rigorous real-world training. The Armed Forces do not anticipate virtual reality replacing traditional training methods anytime soon.

Next, we'll explore additional uses of virtual environments within the military.

Other Applications

Another key use of virtual environments in the military is battlefield visualization. This tool is crucial for developing real-time combat strategies and is a core part of training for commanding officers. It enables commanders to evaluate their options carefully before making decisions that could endanger soldiers' lives.

Applications such as Google Earth and SketchUp have simplified the process of generating 3D maps, making it both affordable and accessible. Modern military strategists can now examine a 3D representation of any terrain, analyzing it from various perspectives to devise tactics and identify possible logistical challenges.

The military has experimented with VR workbenches as a tool for battlefield visualization. By wearing specialized goggles, users experience a sense of depth, making the images on the workbench appear three-dimensional. This setup allows multiple participants to view the same scene simultaneously, provided they are equipped with the necessary eyewear.

With the increasing power of personal computers and graphics cards, the reliance on specialized display technology has diminished. A robust laptop now suffices for many of the military's visualization requirements. The military has successfully repurposed numerous commercial software and hardware solutions to meet its specific needs. While personal computers may not offer the same immersive experience as dedicated VR systems, they are far more cost-effective and simpler to integrate into networks.

Virtual environments are also employed by the military to train soldiers for emergency situations. The Navy Research Laboratory, for instance, runs the Virtual Environment Training Technology program. This initiative uses virtual simulations to teach sailors how to handle fires aboard ships. Although the program is still undergoing validation, it holds the promise of enabling sailors to practice hazardous procedures in a secure and controlled setting.