Surface duct

urn:mrn:iala:dic:4-1-1005

Alternative term: Ground-based duct

A tropospheric radio duct in which the lower boundary is the surface of the earth.

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