 
 <prompt> Wetin di third "S" inside "MANPADS" dey refer to? Based on di previous question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: NATO define anti-aircraft warfare (AAW) as "measures wey dem take to defend a maritime force against attacks by airborne weapons wey dem launch from aircraft, ships, submarines and land-based sites." For some armies dem dey use the term All-Arms Air Defence (AAAD) for air defence by non-specialist troops. Other terms wey dey from the late 20th century include GBAD (Ground Based AD) with related terms SHORAD (Short Range AD) and MANPADS ("Man Portable AD Systems": typically shoulder-launched missiles). Anti-aircraft missiles dey variously called surface-to-air missile, wey dem dey abbreviate and pronounce as "SAM" and Surface to Air Guided Weapon (SAGW). 