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oceanic oceanic /əυʃi|nk/ adjective referring
to the oceans
The trade winds
maintain their direction over the oceanic
areas, especially the Pacific, more
than over land areas.  an oceanic
crossing a flight across sea or ocean
octa octa /ɒktə/ noun same as okta
octane rating octane rating /ɒkten retŋ/ noun
the ability of the fuel to resist detonation,
i.e. the higher the number, the
greater is the fuel’s resistance to detonation
odd odd /ɒd/ adjective 1. strange, peculiar

an odd situation
The fact that moist
air is lighter than an equivalent volume
of dry air seems odd to many people. 2.
 odd tenth an odd decimal, e.g. 0.1,
0.3, etc.
Frequency allocation of
localisers in the VHF band is 108–112
MHz at odd tenths e.g. 108.1 and 109.3,
the even decimals being allocated to
VOR facilities. 3. indicating a number a
little greater than the approximate
number given  it is 60-odd miles to
our destination it is a little more than
60 miles to our destination
161 opaque
odd number odd number /ɒd nmbə/ noun a
number which cannot be exactly
divided by two, e.g. 1, 3, 5, 7, etc.
A
(battery) cell contains an odd number
of plates.
OEM OEM /əυ i em/ abbreviation original
equipment manufacturer
offer offer /ɒfə/ noun something, e.g. a sum
of money, that is presented for acceptance
or rejection
He made an offer of
$85,000 for the aircraft.  verb 1. to
show readiness to do something
He
offered to pick up the tickets in advance.
2. to present for acceptance or rejection

The company offered her a job and
she accepted it. 3. to provide
The battery
offers a short term power capability.
official official /ə|fʃ(ə)l/ adjective referring
to an authority, such as the government
or a recognised organisation  an official
weather report a weather report
produced by a meteorological station 
noun a person employed by a government
authority or a corporation
An
official of the civil aviation department
will be visiting today.
offshore offshore /ɒfʃɔ/ adjective at a distance
from the shore
offshore wind offshore wind /ɒf|ʃɔ wnd/ noun a
wind which blows from the coast
towards the sea. Compare onshore
wind
ohm ohm /əυm/ noun a unit of measurement
of electrical resistance.
ampere
COMMENT: Ohm’s Law states that the
current in a circuit is directly
proportional to the voltage causing it
and inversely proportional to the
resistance of the circuit.
oil oil /ɔl/ noun a thick mineral liquid
used as a fuel or to make mechanical
parts move smoothly
oil pan oil pan /ɔl pn/ noun US same as
sump
okta okta /ɒktə/, octa noun a unit of visible
sky equal to one eighth of total area
visible to the horizon
The amount of
cloud cover is given in oktas.
COMMENT: To measure cloud cover,
the sky is divided into imaginary
sections, each covering one eighth of
the total. A cloudless sky is ‘zero
oktas’, and a sky which is completely
covered with clouds is ‘eight oktas’ or
‘eight eighths’.
oleo oleo /əυliəυ/ noun a telescopic strut
in the undercarriage which absorbs
impact loads on landing
A safety
switch is fitted in such a way to the oleo,
that when the oleo is compressed on the
ground, the ‘undercarriage up’ selection
cannot be operated. Full form
oleo-pneumatic
OMOM abbreviation outer market
omit omit /əυ|mt/ verb to leave out, not to
include
High charts show only information
relevant to high altitude flights
and many beacons/aids which are provided
for low operations are omitted to
keep the chart clear. (NOTE: omitting –
omitted)
omni-bearing indicator omni-bearing indicator /ɒmni
beərŋ ndketə/ noun a cockpit
instrument that displays VOR information
and is used for radio navigation.
Abbreviation OBI
omni-bearing selector omni-bearing selector /ɒmni
beərŋ s|lektə/ noun a knob on an
omni-bearing indicator which the
pilot turns to select a radial from a VOR
station. Abbreviation OBS
omnirange omnirange /ɒmnirend"/ noun a
very-high-frequency radio navigation
　
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本文鏈接地址：Dictionary of Aviation下(26)