▁L ough ▁Er ne ▁and ▁Upper ▁L ough ▁Er ne ▁await ing ▁the ▁arrival ▁of ▁German ▁forces ▁in ▁Northern ▁Ireland . ▁However , ▁the ▁I RA ▁plan ▁gave ▁no ▁thought ▁to ▁how ▁German ▁troops ▁were ▁to ▁be ▁brought ▁to ▁Der ry , ▁how ▁control ▁of ▁the ▁sea ▁approaches ▁was ▁to ▁be ▁obtained ▁or ▁where ▁and ▁how ▁the ▁coast ▁of ▁Northern ▁Ireland ▁was ▁fort ified . ▁G ör tz ▁described ▁the ▁plan ▁at ▁the ▁time ▁and ▁its ▁limitations ▁thus : ▁" The ▁plan ▁was ▁therefore ▁completely ▁useless . ▁It ▁nearly ▁broke ▁my ▁heart , ▁since ▁it ▁came ▁from ▁the ▁I RA ▁Chief ▁of ▁Staff ." ▁ ▁H ull ▁in ▁Irish ▁Sec rets ▁describes ▁the ▁plan ▁so : ▁ ▁The ▁plan ▁en vis aged ▁a ▁landing ▁in ▁the ▁neighbourhood ▁of ▁Der ry ▁( in ▁the ▁manner ▁of ▁Nar vik ▁Operation ▁Wes er üb ung ) ▁and ▁a ▁successful ▁con quest ▁of ▁Ul ster ▁with ▁assistance ▁from ▁the ▁I RA . ▁The ▁I RA ▁planned ▁a ▁ground ▁off ensive ▁beginning ▁in ▁County ▁Le it rim ▁with ▁a ▁front ▁on ▁the ▁Lower ▁and ▁Upper ▁L ough ▁Er ne ▁which ▁would , ▁somehow , ▁lead ▁to ▁the ▁destruction ▁of ▁all ▁British ▁forces ▁in ▁Northern ▁Ireland . ▁The ▁b ait ▁for ▁the ▁Germ ans ▁was ▁supposed ▁to ▁be ▁the ▁change ▁of ▁neutral izing ▁the ▁R AF ' s ▁use ▁of ▁L ough ▁Er ne ▁as ▁a ▁tact ical ▁base ▁against ▁the ▁U - bo at ▁fleet . ▁The ▁plan ▁called ▁for ▁the ▁deployment ▁of ▁ 5 0 , 0