How specifications and unit histories are used together

A. J. Jackson's Blackburn company history and the British aircraft specifications collection provide the main technical foundations. Period specifications sometimes assume knowledge of earlier aircraft, so the account adds explanations instead of treating every line as self-explanatory. Aircraft characteristics and initial unit assignments are checked against specialist Fleet Air Arm squadron and ship histories. The sources answer different historical questions about intended characteristics, company design, and operational units. This passage makes the basis of the later technical claims and squadron details explicit, including where interpretation enters the account.