Another reason to add Navies:
2nd Doctrine, top unit is SuperSniper (Vasily Zaitcev from EatG), who's life and combat carrer is very les known by western people.
Actually, his rank was "Starshina 1 Class" (it is "Navy" variant of "Sergeant" in Infantry), and he was a origin Navy Infantry man from Pacific Ocean Fleet Navy Infantry. In autumn 1942 he was (together with several hundreds of other "Morpekhs") transferred to Stalingrad, and fought in 284sd (Strelkovaya Divisiya - "Rifle Division").
And originally, he must have NAVY uniform
Later, almost at the end of Stalingrad Battle, he was badly wounded by mortar mine explosion, blinded. Only in mid.1943 doctors could luckily heal his eyes.
Later he was a chief of Sniper school, later - Commander of Mortar Battery, and ended War as a Company Commander.