The Variant and Subvariant structure is unique to hobbyDB and helps organize the database. Learn more by reading
What is a Variant
and
What is a Subvariant
in our help section.
Doc Flighty
The Variant and Subvariant structure is unique to hobbyDB and helps organize the database. Learn more by reading
What is a Variant
and
What is a Subvariant
in our help section.
A casual approach to military aviation health, written by a USAF doctor in the early 1960s.