practice shell used in training instead of HESH. L50 HE. This new HE shell is slightly longer than the older shells, uses of ROWANEX (stands for Royal Ordnance Waltham Abbey new explosive an RDX-based formulation) insensitive plastic bonded explosive and provides significantly greater lethality, which the supplier claims is equivalent to the 155 mm HE M107. L52 contains four canisters filled with red phosphorus smoke. L54 "black light" illumination, using the same configuration as L43, to assist observation through night viewing devices. L83 drill. An inert shell for non-firing training purposes. A white phosphorus smoke shell has never been adopted by the UK for L118. A base bleed insensitive HE shell, with a maximum range of has been developed. Subsequent enhancements During the early 1990s all UK L118 were fitted with a muzzle velocity measuring device (MVMD), a radar, and its power supply. In 2002 the British Army's L118 guns completed replacement of their optical sights with the LINAPS artillery pointing system (APS) mounted above the barrel. This is a self-contained system that uses three ring laser gyros to determine azimuth, elevation angle and trunnion tilt angle. It also includes facilities for navigation and self-survey using a global positioning system, inertial direction measurement and distance measurement. All this can be used anywhere in the world to lay the gun without external references. The outputs and inputs for APS are through the touchscreen layer's display and control unit (LCDU) that replaced the conventional dial sight and its mount. The LCDU enables the layer to lay the gun by moving the barrel until the LCDU displays no difference between the ordered firing data and where the barrel is pointing as determined by the LINAPS sensors. A capability enhancement program that started delivering improvements to UK guns in 2007 aimed at reducing weight and improving some components. Weight reduction measures include the replacement of some steel components by titanium, however, only some elements entered UK service. The MVMD is also more tightly coupled with the LCDU, reducing electrical power requirements. Around 2010, new direct fire sights for longer range use were introduced for service in Afghanistan. These comprise a sniper's telescopic sight and a new night sight. At the end of 2011, a new LCDU with a slightly larger touchscreen was ordered. It may enable data transfer from FC-BISA and include the NATO armament ballistic kernel (NABK) for direct fire shooting. Variants L119