Soviet Navy Ranks

•	Soviet Union Navy		United States Navy equivalent rank
G4	Адмира́л фло́та (Admiral Flota) [1]		Admiral	Adm
G3	Адмира́л (Admiral)		Vice Admiral	VAdm
G2	Ви́це-адмира́л (Vice Admiral)		Rear Admiral	RAdm
G1	Ко́нтр-адмира́л (Kontr Admiral)		Commodore [2]	Comd
O6	Капита́н 1-го ра́нга (Kapitan, 1-go ranga)		Captain	Capt
O5	Капита́н 2-го ра́нга (Kapitan, 2-go ranga)		Commander	Cdr
O4	Капита́н 3-го ра́нга (Kapitan, 3-go ranga)		Lieutenant Commander	LtCdr
O3	Капита́н-лейтена́нт (Kapitan Leytenant)	kpt.-leytn.	Lieutenant	Lt
O2	Ста́рший лейтена́нт (Starshiyi Leytenant)		Lieutenant (Junior Grade)	Lt(jg)
O1	Лейтена́нт (Leytenant)	leytn.	Ensign	Ens
O1	Мла́дший лейтена́нт (Mladshij Leytenant)		(Sub Lieutenant)	Sub-Lt
E*	Курсант (Kursant)		Midshipman	Mid
E*	Мичман (Michman)		Petty Officer	PO

NOTES:
Transliterations are approximate as there is no standard convention for converting the Cyrillic alphabet to Modern Roman.
The Russian Navy included land-based units, (naval infantry, coastal artillery, etc.), which used the nomenclature of the ground forces.

[1] There was no rank in the Soviet Navy higher than Admiral until 1944, when Admiral Flota (Admiral of the Fleet) was introduced.

[2] Up to April 1943 the USN rank of Commodore was Rear Admiral (Lower Half) [R.Adm. (LH)], and Rear Admiral was know as Rear Admiral (Upper Half) [R.Adm. (UH)].

E* Senior enlisted rank.