Perhaps I missed something but after getting a promotion and a new sub (it's Apr 43) I left port and discovered much to my dismay that the surface search radar (SJ) that I had in my old sub was gone

. After punching a bulkhead I soldiered (or rather sailored) on with the mission without it.
After completing this, rather successful, patrol (4 merchants and one aircraft), I ended my patrol. I promoted some of the crew, commended others and then deliberately ensured I selected the SJ radar and then embarked on my next patrol.
Once my sub appeared I was on the bridge and looking up noticed there was no SJ radar dish rotating etc. I go to the radar station and sure enough, it doesn't work.
Is there a workaround for this?