MIL-L-26990B, MILITARY SPECIFICATION: LIGHT, MARKER, AIRPORT APPROACH, HIGH INTENSITY, TYPE MB-1 (18-APR-1967)

MIL-L-26990B, MILITARY SPECIFICATION: LIGHT, MARKER, AIRPORT APPROACH, HIGH INTENSITY, TYPE MB-1 (18-APR-1967)., This specification covers one type of high-intensity, airport approach marker light, designated type MB-1.