Tropospheric radio duct

urn:mrn:iala:dic:4-1-1000

A quasi-horizontal layer in the troposphere between the boundaries of which radio energy of a sufficiently high frequency is substantially confined and propagated with abnormally low attenuation.

Reference: C.C.I.R.

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

English

ampere

Contrast

Celsius (previously Centigrade)

Capacitance

charge current

Intensity

Reserve buoyancy

Reflected amplitude

Range (also ρ)

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM