загальні експлуатаційні правила
Rules of the Road (see: Navigation Rules)
international rules in force
regulations, rules and policies
Rules of Engagement (ROE)
clearance rules
certification rules
aeronautical rules
visual flight rules (VFR)
air safety rules
design rules
flying safety rules
instrument flight rules (IFR)
instrument flight rules operation
instrument rules flight
visual flight rules
VFR traffic (visual flight rules)
navigation rules
security rules
firing rules
udev rules are installed correctly
battlefield operating system (BOS)
buffer and operating-rod group
common operating environment (COE)
contemporary operational environment / contemporary operating environment (COE)
deployment operating base
emergency fleet operating base
forward operating base (FOB)
ground operating equipment
missile operating area
naval base; naval operating base
naval operating base (fixed or temporary)
operating environment (OE)