▁( 1 9 2 8 ), ▁first ▁sub marine ▁of ▁its ▁class , ▁renamed ▁after ▁Captain ▁and ▁sub marine ▁pione er ▁Isaac ▁Per al ▁in ▁ 1 9 3 2 . ▁▁ ▁( 1 9 2 8 ), ▁class ▁C ▁second ▁unit . ▁▁ ▁( 1 9 2 9 ), ▁class ▁C ▁third ▁unit . ▁S unk ▁by ▁Naz i ▁German ▁sub marine ▁U - 3 4 ▁on ▁ 1 2 ▁December ▁ 1 9 3 6 ▁near ▁Mal aga ▁▁ ▁( 1 9 2 9 ), ▁class ▁C ▁fourth ▁unit . ▁▁ ▁( 1 9 3 0 ), ▁class ▁C ▁fifth ▁unit . ▁▁ ▁( 1 9 3 0 ), ▁class ▁C ▁sixth ▁unit . ▁ ▁July ▁ 1 9 3 6 ▁- ▁Early ▁ 1 9 3 9 ▁ ▁These ▁are ▁the ▁main ▁naval ▁units ▁of ▁the ▁Spanish ▁Republican ▁Navy ▁between ▁the ▁July ▁coup ▁against ▁the ▁Spanish ▁Republic ▁and ▁the ▁defeat ▁of ▁the ▁Republican ▁Ar med ▁Forces ▁in ▁the ▁Civil ▁War . ▁All ▁surv iving ▁ships ▁became ▁part ▁of ▁the ▁Navy ▁of ▁Franco ist ▁Spain . ▁ ▁D read n ought s ▁ ▁Ja ime ▁I ▁( 1 9 2 1 – 1 9 3 7 ), ▁s unk ▁on ▁ 1 7 ▁June ▁ 1 9 3 7 ▁after ▁an ▁explos ion ▁during ▁repair ▁works . ▁Some ▁authors ▁believe ▁the ▁explos ion ▁was ▁the ▁result ▁of ▁sab ot age ▁by ▁Fif th ▁column ist ▁organization ▁Soc or ro ▁Blan co ▁members ▁in ▁Cart ag ena . ▁ ▁Cru is ers