UAV is projecting, as long as they are on the same frequency. It also increases the distance and area of communication. Preliminary TCDL testing conducted at Dugway Proving Ground was a success. This led to an estimated fielding date of May 2010 for TCDL. In March 2015, the first Shadow unit was equipped with the upgraded RQ-7BV2 Shadow version. New capabilities for the BV2 include the TCDL, encryption of video and control data-links, software that allows interoperability between other UAS platforms, integration of a common control station and control terminal for all Army UAS platforms, an electronic fuel-injection engine, and increased endurance to nine hours through a lengthened wingspan of , with weight increased to . Shadow systems are being upgraded at a rate of 2-3 per month, with all Army Shadows planned to become BV2s by 2019. In 2020, the Army introduced the Shadow Block III. The configuration allows the Shadow to fly in rainy conditions of up to two inches per hour, a four-fold increase over previous versions, carries the L3 Wescam MX-10 EO/IR camera with enhanced image collection, has a Joint Tactical Radio System to enable communications relay, and uses a more reliable and powerful engine configuration with reduced noise. Armed Shadow On 19 April 2010 the Army issued a "solicitation for sources sought" from defense contractors for a munition for the Shadow system with a deadline for proposals due no later than 10 May 2010. Although no specific munition has been chosen yet, some possible munitions include the Raytheon Pyros bomb, the General Dynamics 81 mm 4.5 kg (10-pound) air-dropped guided mortar, as well as the QuickMEDS system for delivering medical supplies to remote and stranded troops. The Army subsequently slowed work, and the Marine Corps then took the lead on arming the RQ-7 Shadow. Raytheon has conducted successful flight tests with the Small Tactical Munition, and Lockheed Martin has tested the Shadow Hawk glide weapon from an RQ-7. On 1 November 2012, General Dynamics successfully demonstrated their guided 81 mm Air Dropped Mortar, with three launches at hitting within seven meters of the target grid. As of August 2011, the Marine Corps has received official clearance to experiment with armed RQ-7s, and requires AAI to select a precision munition ready for deployment. AAI was awarded $10 million for this in December 2011, and claims a weapon has already been fielded by the Shadow. In 2014,