▁settings : ▁safe ▁or ▁in ▁use ." ▁ ▁One ▁of ▁the ▁last ▁things ▁that ▁a ▁pilot ▁does ▁when ▁cre wing - in ▁before ▁take - off , ▁is ▁to ▁remove ▁the ▁safety ▁pin ( s ) ▁so ▁that ▁the ▁seat ▁is ▁" live ". ▁The ▁safety ▁pin ▁on ▁the ▁seat ▁could ▁also ▁be ▁mis - aligned , ▁which ▁when ▁viewed ▁from ▁a ▁normal ▁vertical ▁down ward ▁angle , ▁means ▁that ▁it ▁looks ▁to ▁be ▁in ▁the ▁' safe ' ▁position , ▁but ▁would ▁not ▁be . ▁This ▁means ▁that ▁the ▁yellow ▁and ▁black ▁st rap ▁that ▁s its ▁between ▁the ▁pil ots ▁legs ▁( the ▁SF H ) ▁can ▁be ▁pulled ▁up wards ▁sharp ly ▁and ▁the ▁seat ▁will ▁deploy . ▁The ▁SF H ▁can ▁also ▁be ▁pushed ▁accident ally ▁into ▁a ▁down ward ▁position , ▁so ▁that ▁any ▁amount ▁of ▁down ward ▁pressure ▁upon ▁it ▁will ▁allow ▁the ▁e jection ▁to ▁activ ate . ▁ ▁The ▁coron er ▁was ▁critical ▁of ▁Martin - B aker , ▁who ▁knew ▁about ▁how ▁the ▁b olt ▁that ▁retained ▁the ▁dro gue ▁par ach ute ▁was ▁not ▁to ▁be ▁over - t ight ened ▁as ▁far ▁back ▁as ▁January ▁ 1 9 9 0 . ▁Martin - B aker ▁had ▁informed ▁some ▁operators ▁of ▁the ▁M k 1 0 B 1 ▁seat ▁( including ▁many ▁military ▁air ▁forces ▁world wide ) ▁not ▁to ▁over - t ight en ▁the ▁b olt , ▁but ▁had ▁not ▁informed ▁either ▁the ▁Mo D ▁or ▁the ▁Royal ▁Air ▁Force .