While BR 3021 is a cornerstone of UK naval standards, it is frequently cited alongside other international and domestic specifications:
for equipment installed on naval vessels. It ensures that hardware can survive "high-impact shock"—the kind produced by near-miss gunfire, sea mines, or torpedoes—without failing structurally or losing functionality. Key Components of the Standard br 3021 standard pdf
: Common items required to meet this standard include electrical UPS systems, transformers, marine engines, sonar/radar systems, and shaft seals. Associated Standards While BR 3021 is a cornerstone of UK
BR 3021 categorizes equipment based on its location within the vessel, as different areas experience varying shock intensities: Shock Grade Application Area Vertical Severity Lateral Severity Below the waterline (Hull-mounted) 120g, 8 ms NSS Grade II Above the waterline (Deck/Bulkhead) 50g, 11 ms 22g, 11 ms Associated Standards BR 3021 categorizes equipment based on