▁o xygen ▁react ants . ▁ ▁S ector ▁ 5 ▁( 7 0 ° ) ▁contained ▁the ▁S PS ▁fuel ▁sum p ▁tank . ▁This ▁was ▁the ▁same ▁size ▁as ▁the ▁ox id izer ▁sum p ▁tank ▁and ▁held ▁ ▁of ▁fuel . ▁ ▁S ector ▁ 6 ▁( 6 0 ° ) ▁contained ▁the ▁S PS ▁fuel ▁storage ▁tank , ▁also ▁the ▁same ▁size ▁as ▁the ▁ox id izer ▁storage ▁tank . ▁It ▁held ▁ ▁of ▁fuel . ▁ ▁The ▁forward ▁fair ing ▁measured ▁ ▁long ▁and ▁hous ed ▁the ▁reaction ▁control ▁system ▁( R CS ) ▁computer , ▁power ▁distribution ▁block , ▁E CS ▁controller , ▁separation ▁controller , ▁and ▁components ▁for ▁the ▁high - g ain ▁anten na , ▁and ▁included ▁eight ▁E PS ▁radi ators ▁and ▁the ▁um bil ical ▁connection ▁arm ▁containing ▁the ▁main ▁elect rical ▁and ▁pl umb ing ▁connections ▁to ▁the ▁C M . ▁The ▁fair ing ▁extern ally ▁contained ▁a ▁ret ract able ▁forward - f acing ▁spot light ; ▁an ▁E VA ▁flo od light ▁to ▁aid ▁the ▁command ▁module ▁pilot ▁in ▁S IM ▁film ▁retr ieval ; ▁and ▁a ▁flash ing ▁rende z vous ▁be acon ▁visible ▁from ▁ ▁away ▁as ▁a ▁navigation ▁aid ▁for ▁rende z vous ▁with ▁the ▁L M . ▁ ▁The ▁SM ▁was ▁connected ▁to ▁the ▁C M ▁using ▁three ▁t ension ▁t ies ▁and ▁six ▁compression ▁p ads . ▁The ▁t ension ▁t ies ▁were ▁st ain less ▁steel ▁stra ps ▁bol ted ▁to ▁the ▁C M '