I no it says on the navy site that when you sign up you get full pay which is something like 14,300 ish but is this true, just need to make sure my bills get paid while I'm away ,
is it about £1100 a month?
You'll take home after tax £1067.44. However, there will be other deductions for rent/food etc from the navy. I don't know how much they are off the top of my head. I do remember reading a thread about it on here at some point and think you'll have about £850 to play with after all is said and done (I might be wrong, just remembering of top of my head, do a search)
Edit, Go ask your careers adviser because really I might be chatting shit