DryVent™ fabrics are engineered to be fully waterproof,The outer face of the textile is treated with a durable water repellant finish that helps form droplets and repel water from the surface. Each multi layered textile is engineered to allow water vapor to pass through from the inside to the outside. DryVent™ fabrics are engineered in a variety, weights, textures and performance characteristics that allows us to provide maximum protection, performance and comfort for the user across all our active and lifestyle waterproof, breathable clothing and accessories. All DryVent™ clothing and accessories are fully seam sealed and designed with specific features that are relevant to the user’s specific activity needs and conditions. All products that are fully taped, waterproof and breathable will be branded DryVent™. DryVent™ fabrics using a 3 Layer construction are primarily used on high performance technical styles that are designed

for the most extreme user in their activity segment. are designed to be extremely durable and breathable and are used for longer durations in severe conditions. These types of fabrications are specified for use in our most technical clothing and accessories. DryVent™ fabrics using a 2.5 Layer construction are primarily used for highly active, fast and light pursuits, where light weight and packable is an essential requirement of the user. layer is finished with a functional dry touch print that helps raise the fabric from the skin to provide comfort and enable the quick transfer of vapor through to the outside of the fabric. are generally designed into unlined clothing and accessories for maximum light weight, packable, waterproof and breathable performance. DryVent™ fabrics using a 2 Layer construction are our most versatile and used across all our categories. designed into clothing and accessories that are normally lined with a

secondary fabric for extra comfort and increased warmth. products can also be designed with fixed insulation for ultimate warmth and versatility and can be found in a wide range of looks and finishes.Military radios were once associated with large backpacks full of heavy electronic equipment, all of which yielded limited operating functionality and reliability. backpack dcuoBut as wireless communications has advanced in the form of light-weight cellular telephones for civilians, it has also evolved into compact, highly reliable and secure portable radios for the battlefield—whether said battlefield happens to be on land, at sea, or in the air. pedaltrain backpackRelated Articles • Tactical Radio Earns Top Secret Certification • Board-Level Radios Available At 2.4 GHz • Encryption Keeps Tiny Radios Secure Tactical radios have incorporated anti-jamming functions, frequency hopping, software-defined-radio (SDR) technologies, and various battery/power technologies to enhance usability and reliability. bhpc backpack trolley

What follows is a sampling of some of the newer portable and man-pack radios for tactical use and other critical applications [such as search-and-rescue (SAR) operations], along with some of the technologies supporting these radios. A firm long synonymous with tactical portable radios (as well as the cellular telephone), Motorola, has helped push the evolution of battlefield radios as much as any company. clc backpack ebayAt present, Motorola Solutions USA is encouraging its radio designers to make use of commercial-off-the-shelf (COTS) components in their radio products to achieve performance and reliability levels needed for the battlefield at reduced costs. wenger sahara backpackAs an example, the SRX 2200 combat radio is built for the battlefield with COTS components but is also backwards- and forwards-compatble with all of the firm’s mission-critical radio systems. north face miwok backpack

It also meets the latest Project 25 (P25) standards for interoperability. P25 is a suite of standards for digital radio communications in North America that allows different government agencies to communicate. It is somewhat similar, although not interoperable, with the European Terrestrial Trunked Radio (TETRA) protocol used in Europe. Using COTS components and technology, the SRX 2200 (Fig. 1) is designed for use in the harshest environments. It includes a receiver with 80-dB dynamic range, is compliant with US Department of Defense (DoD) standards for APCO  waveforms and encryption, and meets Federal Information Processing Standard (FIPS) 140-2 Level 3 security for use in the most sensitive environments. The radio offers a full suite of communications-ready features and applications, such as secure encrypted voice and text messaging and over the air programming (OTAP), a tactical over-the-air-rekey (OTAR) function, and individual location information (ILI). It meets MIL-810 specifications and exceeds the IP67 submersion specification (allowing it to be submerged under 2 m of water for 2 hours).

Another name strongly connected with tactical radios is Harris Corp. The firm recently received orders from the US Air Force for Falcon III AN/PRC-117G multiband man pack and AN/PRC-152A multiband handheld tactical radio systems (Fig. 2). These wideband radios will help provide wideband networking capabilities to a wide range of US Air Force users. Both radios are equipped with the Harris Adaptive Networking Wideband Waveform, which is designed for interoperability among a wide range of radio systems and software applications. The radios are also certified to operate with the Joint Tactical Radio System (JTRS) waveform, and can also work with SINCGARS, HAVEQUICK, and P25 waveforms for secure tactical use.   The AN/PRC-152A is truly a multiband radio, with traditional amplitude-modulation (AM) and frequency-modulation (FM) coverage from 30 to 512 MHz (12.5 to 25.0 kHz for narrow band) and 1.2 MHz for wideband operation with networking waveforms from 225 to 450 MHz. It uses 5 W transmit power for line-of-sight (LOS) use and 10 W transmit power when working in satellite-communications (satcom) mode.

The radio can also test signals from 762 to 870 MHz with 10-Hz tuning resolution across all of the frequency ranges. George Helm, president of Harris’ US Department of Defense business unit, elaborates: “Harris’ Falcon III radios provide secure voice communications and enable operators to send and receive images, video, e-mails, text messages and even participate in teleconferences.’’ He adds: “The Air Force is deploying our JTRS-certified radios to provide two-channel communication capabilities. JTRS-certified wideband networking allows users to connect seamlessly to the Global Information Grid, a secure, classified version of the Internet.’’ The company has shipped more than 40,000 AN/PRC-117G and AN/PRC-152A radios to all branches of the US military and to more than 15 allied nations. Boeing has worked closely with the US Air Force in supporting the military branch’s combat survivor evader location (CSEL) program, with a new multifunction handheld radio designated the AN/PRQ-7 .

It is capable of transmitting on at least 121.5, 243.0, and 406.025 MHz (the COSPAS-SARSAT satellite tracking SAR system). The radio system also received Global-Positioning-System (GPS) signals. The radio is designed to securely communicate position and text messages via a data link through the CSEL UHF SATCOM network. The AN/PRQ-7 portable radio is software programmable and upgradeable and can receive over-the-horizon (OTH) waypoints and text messages. It includes NSA-certified encryption and decryption of LOS and OTH messages. The radio, which works with a wideband flat blade antenna, is rated to withstand 10 m liquid submersion and operating temperatures from -20 to +55°C. It is tested to MIL-STD-810 requirements and weighs only 32 oz. with its rechargeable battery. It includes four UHF/VHF guard channels for voice transmissions. The US Army recently designated the two-channel AN/PRC-155 man pack tactical radios for inclusion in its Capability Set (CS) 14, a package of radios, satcom systems, software, and portable electronic devices for network communications.