The newer Borkum Lijn flag is yellow, 1:2, with white AG EMS outlined black above black BORKUMLIJN. Dark-grey horizontal lines flank the inscription, over irregular diagonal bands in Dutch blue, white and red.
The earlier 1:2 Borkum Lijn flag has a central green cross with white and black edging. Light-blue lower-hoist and upper-fly quarters each contain a yellow five-pointed star; the red upper-hoist and lower-fly quarters carry white B and L respectively.
Keep the explicit scope label independent; no alias or company identity is inferred.