Template:Soviet scout designations - English Wikipedia @ Freddythechick

v t e Soviet scout aircraft designations, 1923–1940
Scout (R)	R-1 R-2 R-3 R-4 (I) R-4 (II) R-5 R-6 R-7 R-8¹ R-9 R-10 R-11¹ R-12 R-Z
Shipboard scout (KR)	KR-1 KR-2
Cruiser scout (KR)	KR-1¹ KR-2¹ KR-3¹ KR-4¹ KR-5¹ KR-6
Shipboard catapult-scout (KOR)	KOR-1 KOR-2 KOR-3
Scout seaplane (MR)	MR-1 MR-2 MR-3 (I) MR-3 (II) MR-4¹ MR-5 (I) MR-5 (II) MR-6
Short-range scout seaplane (MBR)	MBR-1 MBR-2 MBR-3 MBR-4 MBR-5 MBR-6¹ MBR-7
Long-range scout seaplane (MDR)	MDR-1 MDR-2 MDR-3 MDR-4 MDR-5 MDR-6 MDR-7 MDR-8¹ MDR-9¹ MDR-10
Open-sea scout seaplane (ROM)	ROM-1 ROM-2
Descriptors	Long-range reconnaissance seaplane torpedo bomber MDRT
¹ Unknown/not assigned