▁ 2 4 ▁June , ▁the ▁vessel ▁sa iled ▁from ▁A uck land ▁to ▁F iji ▁as ▁part ▁of ▁Ex erc ise ▁Trop ical ▁D ust . ▁En ▁route ▁to ▁F iji , ▁the ▁light ly ▁l aden ▁Charles ▁U ph am ▁showed ▁a ▁prop ens ity ▁to ▁roll , ▁and ▁reached ▁ 3 7 ▁degrees ▁from ▁centre ▁during ▁one ▁heavy ▁storm ; ▁the ▁degree ▁of ▁roll ▁caused ▁the ▁main ▁fuel ▁p ump ▁to ▁fail ▁and ▁the ▁ship ▁experienced ▁a ▁bro aching ▁effect . ▁The ▁conditions ▁led ▁to ▁the ▁ship ▁being ▁nick named ▁" Char les ▁Ch uck am " ▁and ▁" Ch uck - Up ", ▁and ▁the ▁command ing ▁officer ▁was ▁so ▁concerned ▁for ▁the ▁safety ▁of ▁the ▁ship ▁and ▁his ▁personnel ▁that ▁on ▁return ▁to ▁New ▁Zealand ▁on ▁ 3 ▁August , ▁Charles ▁U ph am ▁was ▁with dra wn ▁from ▁service ▁until ▁modifications ▁could ▁be ▁made ▁to ▁improve ▁stability . ▁Other ▁alter ations ▁planned ▁as ▁part ▁of ▁this ▁conversion ▁included ▁the ▁installation ▁of ▁a ▁flight ▁deck ▁and ▁facilities ▁for ▁two ▁mid - size ▁hel ic op ters , ▁and ▁an ▁increase ▁in ▁soldier ▁accommod ation ▁by ▁ 1 0 0 , ▁bringing ▁the ▁number ▁of ▁available ▁ber th s ▁for ▁ship ' s ▁personnel ▁and ▁passengers ▁to ▁ 2 1 5 . ▁Investig ation ▁found ▁that ▁up ▁to ▁ ▁of ▁cargo ▁or ▁ball ast ▁( half ▁the ▁ship ' s ▁designed ▁load ) ▁was ▁required ▁to ▁minim ise ▁excess ive ▁motion , ▁and ▁operation ▁of ▁a ▁hel ic opter