09/014- Nuke with stress fracture, moved to Ship 04/ Divn ? 2341 ?

OK, Justin’s fiancé got a short phone call from him this evening. This is our 2cnd call since he left Oct 5, and first since we heard of his leg “injury” in his letter written Nov 2. 
He had the bone scan (done Nov 10) and they confirmed he has a “stress fracture” in his right leg. He must still be on “light duty” and/or in “physical therapy” (I didn’t speak to him), as he again says he will not be able to graduate with his original class.
His address has changed, he is now on ship 04, but I was told his division is “2341”. I have not heard of this kind of division…is it for those with injuries, waiting to resume boot camp with another division when he has been OK’d by the Dr.?
Rebecca said he sounded “positive”, and he thinks he may be able call every other week.
Anyone with any experience with this please let me know. Again, he is a Nuke, and was originally in 09/014, and was to PIR Dec. 2, and leave for SC on Dec 3. He was to have some time off at Christmas, but I guess he will now get whatever schedule his new division has??? Again, Thanks!