MIL-HDBK-2089, MILITARY HANDBOOK: AIRCRAFT SURVIVABILITY TERMS (30 MAY 1997) [SUPERSEDING MIL-STD-2089]., This document establishes standardized definitions for aircraft nonnuclear survivability terms so that communication problems that have confronted survivability practitioners as well as workers in allied disciplines, both in government agencies and industry, can be resolved. This handbook is for guidance only. This handbook cannot be cited as a requirement. If it is, the contractor does not have to comply.