: A separate volume, BR 3021 (2) , specifically addresses shock mountings—specialized components designed to limit force and return equipment to its initial position after an impact. Shock Grades and Levels
: Specifies shock levels based on the equipment's mass, its installed position (e.g., below or above the waterline), and the type of mounting used (rigid vs. resilient). Mazagon Dock Shipbuilders Limited Technical Implementation Shock Resistance Analysis br 3021 standard pdf
The standard specifies distinct "grades" based on where the equipment is installed and its importance to the ship's mission: : A separate volume, BR 3021 (2) ,
Providing specific shock grades (e.g., NSS-I and NSS-II) to categorize testing severity based on where equipment is installed on a vessel. Mounting Guidelines: at the time
The BR Class 302/1 is a cautionary tale in railway preservation. A reliable, handsome, and historically significant train was allowed to vanish completely because, at the time, they were viewed merely as "old commuter junk" rather than heritage assets.