and improved 'Bowmanised' version of ITT Corporation's company/squadron-level SINCGARS (Single Channel Ground and Airborne Radio System) frequency-hopping radio with a 30-88 MHz frequency range. Depending on its configuration, the ADR+ is variously designated UK/PRC355 (5 W manpack), UK/PRC356 (16 W ground-role manpack), UK/VRC357 (16 W vehicle clip-in radio), UK/VRC358 (16 W low-power vehicle radio), or UK/VRC359 (50 W vehicle-mounted high-power radio). The manpack version of the ADR+ has an Automatic Situational Awareness Module inserted in BCIP 5.2 which enables Own Station Position Reports to be broadcast without the presence of an associated computer. Under the terms of the baseline contract, ITT Defence delivered some 26,000 ADR+ radios and 8,000 VPTs, complemented by 580 examples of the UK/ARC341 VHF aircraft role radio (a derivative of the company's SINCGARS AN/ARC-201D airborne transceiver) for helicopter platforms. HF radios The Bowman HF frequency-hopping radios, of which 10,800 examples were supplied is designated UK/PRC325 in its basic 20 W manpack form and UK/VRC328/9 in its 100 W high-power and co-sited vehicular configurations. Essentially a UK equivalent of the US AN/PRC-150, it has had the proprietary Harris Citadel encryption from the original RF-5800H replaced with UK Type 1 (Pritchel) encryption and frequency hopping waveform. The Falcon II's original dual-band HF/VHF frequency range (1.6-60 MHz) has been narrowed to the 1.6-30 MHz (HF) band. HCDR The top tier in the Bowman series of radios is provided by the UHF, Mobile ad hoc network ITT UK/VRC340 HCDR (High Capacity Data Radio), a 'Bowmanised' version of ITT's Mercury NTDR (Near-Term Data Radio) wide-band networking transceiver. HCDR has a 225-450 MHz operating frequency range. It has wideband (4 MHz) and narrow band (500 kHz) modem configurations, with a user rate of 288 kbit/s on a 375 kbit/s channel and 576 kbit/s on a 750 kbit/s channel. Some 3,600 HCDRs were purchased. HCDR provides a self-managing mobile Internet Backbone using standard RFC interfaces and routing protocols. Ancillary equipment Provision of the associated User Data Terminal (UDT) for vehicular and static use was contracted to DRS Tactical Systems Inc, which also produces the Bowman Management Data Terminal (BMDT) for network management, the Vehicle User Data Terminal (VUDT) with keyboard and touchscreen for use on the move, the Staff User Data Terminal (SUDT) for command centres, and the PBISA Processing Unit (PBPU) for Challenger 2 tanks. Since the start of the programme, the capabilities of the UDTs (based on 700 MHz Pentium processors)