fixed pressure level

Fixed duty cycle level to be used when using sine mode

depot maintenance (beyond O and I level activities, performed in an industrial-type facility) / D-level maintenance

surveyor's level (surveying level, tbc)

background sound pressure level

overall sound pressure level

adjusted slope of sound pressure level

change in slope of sound pressure level

slope of sound pressure level

average slope of sound pressure level

final background sound pressure level

high level pressure chart

low level pressure chart

noise pressure level

pressure level

sea level atmospheric pressure

sea level pressure

sound pressure level

360° fixed radar

fixed

fixed ammunition

fixed and floating bridge

fixed artillery

fixed bridge

fixed facilities

fixed frame metal detector

fixed frequency channel

fixed installations

fixed post

fixed span

fixed wire entanglement

fixed-orbit satellite

fixed-wing aircraft