2-3-120
A cap (type B) with small pins on its shell which engage.in slots in a lampholder.
Reference: C.I.E.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
Centre of buoyancy
Contrast
Celsius (previously Centigrade)
Capacitance
charge current
Intensity
Illuminance
Energy
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM