man ▁into ▁the ▁officer ▁community . ▁▁▁ ▁Special ty ▁cru ises ▁include ▁E OD ▁cru ises , ▁SE AL ▁cru ises , ▁FO RE X ▁cru ises ▁( mid ship men ▁are ▁attached ▁to ▁a ▁foreign ▁country ' s ▁ship ), ▁and ▁Navy ▁Nur se ▁Cru ises . ▁ ▁Marine ▁Option ▁Mid ship men ▁attend ▁the ▁Marine ▁Corps ' ▁Mountain ▁War fare ▁Training ▁Center ▁for ▁the ▁second ▁summer . ▁ ▁In ▁recent ▁years ▁they ▁have ▁been ▁attached ▁to ▁Marine ▁units ▁under going ▁the ▁summer ▁training ▁package . ▁They ▁learn ▁high ▁alt itude ▁surv ival ▁techniques ▁and ▁under go ▁high ▁alt itude ▁condition ing . ▁It ▁is ▁often ▁j ok ingly ▁called ▁" O CS ▁prep ." ▁Between ▁the ▁junior ▁and ▁senior ▁years , ▁Marine ▁Option ▁mid ship men ▁attend ▁" B ul ld og ," ▁Marine ▁Officer ▁C andid ate ▁School ▁for ▁six ▁weeks . ▁ ▁College ▁Program ▁mid ship men ▁must ▁either ▁obtain ▁the ▁scholar ship ▁before ▁their ▁junior ▁year ▁or ▁receive ▁" ad vanced ▁standing ". ▁In ▁either ▁case ▁the ▁mid ship men ▁will ▁only ▁attend ▁the ▁first ▁class ▁summer ▁cru ise ▁or ▁O CS ▁for ▁Marine ▁Options . ▁ ▁Un iform s ▁of ▁Mid ship men ▁N RO TC ▁students ▁are ▁generally ▁issued ▁several ▁types ▁of ▁uniform s , ▁all ▁for ▁them ▁to ▁keep . ▁The ▁standard ▁issue ▁uniform ▁is ▁the ▁poly / wo ol ▁k h aki , ▁while ▁Summer ▁White ▁and ▁Service ▁D ress ▁Blue ▁( comm only ▁known ▁as ▁S DB s ) ▁are ▁often ▁seen ▁on