▁men ▁lost ▁their ▁lives . ▁ ▁These ▁experiences ▁led ▁sub mar iner ▁Charles ▁B . ▁" Sw ede " ▁M oms en ▁to ▁think ▁of ▁technical ▁alternatives ▁for ▁res cu ing ▁surv iv ors ▁from ▁sun ken ▁sub mar ines , ▁which ▁at ▁that ▁time ▁was ▁still ▁a ▁virtual ▁impos s ibility . ▁M oms en ▁soon ▁conce ived ▁a ▁sub marine ▁rescue ▁chamber ▁that ▁could ▁be ▁lower ed ▁from ▁the ▁surface ▁to ▁mate ▁with ▁a ▁sub marine ' s ▁escape ▁h atch ▁and ▁proposed ▁the ▁concept ▁through ▁official ▁channels . ▁While ▁in ▁command ▁of ▁the ▁sub marine ▁S - 1 ▁( SS - 1 0 5 ), ▁in ▁ 1 9 2 6 , ▁M oms en ▁wrote ▁the ▁Bureau ▁of ▁Const ruction ▁and ▁Rep air ▁( Bu C & R ) ▁recomm ending ▁the ▁ad option ▁of ▁a ▁div ing ▁bell ▁for ▁the ▁purposes ▁of ▁res cu ing ▁entra pped ▁personnel ▁from ▁sub mar ines . ▁But ▁this ▁idea ▁was ▁p ige on ho led ▁by ▁the ▁b ureau c racy , ▁even ▁during ▁his ▁own ▁subsequent ▁assignment ▁at ▁Bu C & R . ▁The ▁loss ▁of ▁S - 4 ▁with ▁all ▁hands ▁put ▁the ▁Navy ▁very ▁much ▁" on ▁the ▁spot " ▁because ▁of ▁the ▁loss ▁of ▁lives ▁that ▁might ▁have ▁been ▁saved . ▁The ▁pressure ▁of ▁this ▁incident ▁forced ▁favor able ▁action ▁and ▁M oms en , ▁using ▁the ▁aircraft ▁hang ar ▁from ▁S - 1 , ▁designed ▁and ▁built ▁a ▁prototype ▁sub marine ▁rescue ▁chamber . ▁ ▁During