The patrol boats are fitted with a Bridgemaster E surface search and navigational radar, a Toplite electro-optical detection system, and a Warrlock direction finding system. A Prism III radar warning system was fitted to the last two boats during construction, and refitted to the rest. Tenders for a Naval Unmanned Aerial System (NUAS) capability for the "Armidale" class were requested in mid-2014. Each patrol boat has a standard ship's company of 21 personnel, with a maximum of 29 (not including use of the austere compartment). Unlike the "Fremantle"-class patrol boats, the "Armidale"s do not have a permanently assigned ship's company. Instead, there are 21 crews established for the 14 "Armidale"-class patrol boats, which are divided up into four divisions: "Attack", "Assail", "Ardent", and "Aware". The first three of the Divisions are assigned six crews for four ships, while "Aware" has three crews for two ships. The ships are continually manned, with two out of three crews actively deployed while the third undergoes leave or training, or prepares to transfer into a ship: a handover can be accomplished in less than six hours. The intention of multi-crewing is to allow the ships to spend more time at sea, without compromising sailors' rest time or training requirements. Junior sailors are housed in four-berth cabins, as opposed to the central sixteen-berth mess deck of the "Fremantle"s, while senior sailors and commissioned officers either have individual or share two-berth cabins. Personnel have access to e-mail and satellite television, and the galley is better equipped than that on a "Fremantle"-class vessel and better suited to use in heavy seas. The comfort of personnel is also significantly improved over the "Fremantle"s, with air conditioning throughout the entire ship (excluding engine and machinery compartments). The introduction of the class into service has not been without problems. Since June 2005, all active "Armidale"s have undergone operating restrictions on two occasions, both due to water contamination of the main fuel systems. The first occurrence, in September 2006, led to the suspension of operations by the patrol boats for a month, and the engineering controls were redesigned. The problem occurred again in January 2007, and led to an 'operational pause' while Austal redesigned the fuel system, engineering procedures were altered, and fuel quality criteria were tightened.