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How RNAV Approach has changed the instrumental flight

How RNAV Approach has changed the instrumental flight 5aM6P
Since the beginning of the instrument flight, we’re always been used to referring to the precision approach by talking about ILS, but lately, new technologies have been developed and the RNAV approach has been born, nowadays it is known as the PBN approach. Why we should fly a PBN approach rather than an ILS approach? Although ILS is precise and it’s able to guide aeroplanes until the touchdown zone, it has some drawbacks. For instance, ILS signal could be disturbed by any device able to transmit radio waves with a similar frequency to ILS. And these devices are very common; for instance, every radio FM transmits music on a range of frequency VHF, which is the same range of frequency used by ILS. Another problem could be the terrain surrounding the airport, but also building could create a problem. As we know ILS beam has a length equal to 18 NM, and its angle is width +-35° from the runway centreline within 10NM and it is width +-10° from 10NM up to 18NM. All this area must be clear of obstacles otherwise it could create interference on the signal. These interferences on the ILS signal could lead to false indications on the pilot instrument which could create an important threat, especially during IMC flight. For this reason, the PBN approach has been developed. These are approaches based on the GPS for this reason we sort out our position through the satellites. This type of approach doesn’t have any kind of interference, differently from ILS, and they are as reliable in precision as the ILS, due to the augmentation system. The most precise PBN approach is the LPV. It’s utterly based on satellites signal, but to improve his precision, it takes advantage of SBAS, which reduce any error to the minimum. A big advance of this type of approach is that the indication on the pilot instruments resembles the ILS indication, so pilots need only a little course to be able to fly a PBN approach.
Since the beginning of the instrument flight, we’re always been
This phrase/word (depending on the context) can be potentially replaced with :
used
to referring to the precision
You use this word too often, consider replacing it with
approach
by talking about ILS,
This phrase/word is too simple and can be replaced with:
but
lately, new technologies have
been developed
and the
Possible spelling mistake found.
RNAV
You use this word too often, consider replacing it with
approach
has
been born
, nowadays it
is known
as the PBN
You use this word too often, consider replacing it with
approach
. Why we should
fly
a PBN
You use this word too often, consider replacing it with
approach
rather
than an ILS
You use this word too often, consider replacing it with
approach
? Although ILS is precise and it’s able to guide
Possible spelling mistake. 'aeroplanes' is British English.
aeroplanes
until the touchdown zone, it has
This phrase/word is too simple and can be replaced with:
some
drawbacks.
For instance
, ILS
You use this word too often, consider replacing it with
signal
could
be disturbed
by any device able to transmit radio waves with a similar frequency to ILS. And these devices are
This phrase/word is too simple and can be replaced with:
very
common;
for instance
, every radio FM transmits music on a range of frequency VHF, which is the same range of frequency
This phrase/word (depending on the context) can be potentially replaced with :
used
by ILS. Another problem could be the terrain surrounding the airport,
This phrase/word is too simple and can be replaced with:
but
also
building could create a problem. As we know ILS beam has a length equal to 18 NM, and its angle is width +-35° from the runway
Possible spelling mistake found.
centreline
within 10NM and it is width +-10° from 10NM up to 18NM. All this area
This phrase/word (depending on the context) can be potentially replaced with :
must
be
This phrase/word (depending on the context) can be potentially replaced with :
clear
of obstacles
otherwise
it could create interference on the
You use this word too often, consider replacing it with
signal
. These interferences on the ILS
You use this word too often, consider replacing it with
signal
could lead to false indications on the pilot instrument which could create an
This phrase/word is too simple and can be replaced with:
important
threat,
especially
during IMC flight.
For this reason
, the PBN
You use this word too often, consider replacing it with
approach
has
been developed
. These are
You use this word too often, consider replacing it with
approaches
based on the GPS
for this reason
we sort out our position through the satellites. This type of
You use this word too often, consider replacing it with
approach
doesn’t have any kind of interference,
differently
from ILS, and they are as reliable in precision as the ILS, due to the augmentation system. The most precise PBN
You use this word too often, consider replacing it with
approach
is the
Possible spelling mistake found.
LPV
. It’s
utterly
based on satellites
You use this word too often, consider replacing it with
signal
,
This phrase/word is too simple and can be replaced with:
but
to
This phrase/word (depending on the context) can be potentially replaced with :
improve
his precision, it takes advantage of
Possible spelling mistake found.
SBAS
, which
This phrase/word (depending on the context) can be potentially replaced with :
reduce
any error to the minimum. A
This phrase/word is too simple and can be replaced with:
big
advance of this type of
You use this word too often, consider replacing it with
approach
is that the indication on the pilot instruments resembles the ILS indication,
This phrase/word is too simple and can be replaced with:
so
pilots need
This phrase/word (depending on the context) can be potentially replaced with :
only
a
This phrase/word is too simple and can be replaced with:
little
course to be able to
fly
a PBN
You use this word too often, consider replacing it with
approach
.

IELTS essay How RNAV Approach has changed the instrumental flight

Essay
  American English
1 paragraphs
335 words
5.0
Overall Band Score
Coherence and Cohesion: 5.5
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Lexical Resource: 5.0
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  • Check your work for spelling and word formation mistakes
Grammatical Range: 6.5
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Task Achievement: 5.0
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    Present relevant ideas
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