., ▁they ▁consist ▁of ▁fr amed ▁symbols ▁associated ▁to ▁points ▁on ▁the ▁map ). ▁They ▁do ▁not ▁appear ▁in ▁AP P - 6 A ▁proper , ▁having ▁been ▁introduced ▁by ▁M IL - ST D - 2 5 2 5 B . ▁ ▁Symbol ▁composition ▁Most ▁of ▁the ▁symbols ▁design ate ▁specific ▁points , ▁and ▁consist ▁of ▁a ▁frame ▁( a ▁geometric ▁border ), ▁a ▁fill , ▁a ▁constitu ent ▁icon , ▁and ▁optional ▁symbol ▁mod ifiers . ▁The ▁latter ▁are ▁optional ▁text ▁fields ▁or ▁graph ic ▁indic ators ▁that ▁provide ▁additional ▁information . ▁ ▁The ▁frame ▁provides ▁a ▁visual ▁indic ation ▁of ▁the ▁affili ation , ▁battle ▁dimension , ▁and ▁status ▁of ▁an ▁oper ational ▁object . ▁The ▁use ▁of ▁shape ▁and ▁colour ▁is ▁redundant , ▁allowing ▁the ▁sym b ology ▁to ▁be ▁used ▁under ▁less - than - ide al ▁conditions ▁such ▁as ▁a ▁mon och rome ▁red ▁display ▁to ▁preserve ▁the ▁operator ' s ▁night ▁vision . ▁Near ly ▁all ▁symbols ▁are ▁highly ▁st yl ised ▁and ▁can ▁be ▁drawn ▁by ▁persons ▁almost ▁entirely ▁lack ing ▁in ▁art istic ▁skill ; ▁this ▁allows ▁one ▁to ▁draw ▁a ▁symbol ic ▁representation ▁( a ▁GR AP H RE P , ▁Graph ical ▁report ) ▁using ▁tools ▁as ▁rud iment ary ▁as ▁plain ▁paper ▁and ▁p enc il . ▁ ▁The ▁frame ▁serves ▁as ▁the ▁base ▁to ▁which ▁other ▁symbol ▁components ▁and ▁mod ifiers ▁are ▁added . ▁In ▁most ▁cases ▁a ▁frame ▁surr ounds ▁an ▁icon . ▁One ▁major ▁exception ▁is ▁equipment ,