▁Category : L iving ▁people ▁Category : C ro at ian ▁male ▁water ▁pol o ▁players ▁Category : C ro at ian ▁water ▁pol o ▁coach es ▁Category : O lymp ic ▁water ▁pol o ▁players ▁of ▁Cro atia ▁Category : W ater ▁pol o ▁players ▁at ▁the ▁ 2 0 0 0 ▁Summer ▁Olympics ▁Category : W ater ▁pol o ▁players ▁at ▁the ▁ 2 0 0 4 ▁Summer ▁Olympics ▁Category : Austral ian ▁water ▁pol o ▁coach es <0x0A> </s> ▁The ▁British ▁R 2 3 X ▁class ▁of ▁rig id ▁air ships ▁were ▁developed ▁during ▁World ▁War ▁I ▁using ▁the ▁experiences ▁gained ▁from ▁the ▁ 2 3 ▁class , ▁but ▁only ▁two ▁of ▁the ▁planned ▁four ▁R 2 3 X ▁class ▁were ▁built : ▁R 2 7 ▁and ▁R 2 9 . ▁Both ▁were ▁completed ▁mid - 1 9 1 8 , ▁but ▁just ▁two - and - a - half ▁months ▁after ▁entering ▁service ▁R 2 7 ▁was ▁destroyed ▁by ▁fire ▁in ▁a ▁hang ar ; ▁while ▁R 2 9 ▁went ▁on ▁to ▁become ▁the ▁most ▁successful ▁British ▁w art ime ▁rig id ▁air ship , ▁being ▁the ▁only ▁one ▁to ▁meet ▁enemy ▁action , ▁as ▁well ▁as ▁the ▁only ▁one ▁to ▁sink ▁a ▁sub marine . ▁ ▁Design ▁and ▁development ▁The ▁V ick ers - des igned ▁ 2 3 ▁class ▁rig id ▁air ships , ▁which ▁were ▁basically ▁" st retch ed " ▁and ▁modified ▁versions ▁of ▁the ▁No . ▁ 9 ▁design , ▁were ▁never ▁used ▁in