Home' Trinidad and Tobago Guardian : March 31st 2014 Contents B7
Monday, March 31, 2014 www.guardian.co.tt Guardian
MINISTRY of FINANCE and the ECONOMY
INLAND REVENUE DIVISION
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• March 31st
• June 30th
• September 30th
• December 31st
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This is guide to calculating your quarterly instalments for 2014.
2013 -- Chargeable Profit
2013 -- Tax on Chargeable Profit - $200,000
2014 -- Estimated Quarterly Tax Payment
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Profit you are advised to increase your quarterly payments to accommodate the increased
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VHF transmission before the plane
would have crossed into Viet-
Learmount says it s also perfectly
feasible that nobody on the ground
noticed the plane s disappearance.
"Malaysian air traffic control had
probably handed it over to the
Vietnamese and forgotten about
it. There could have been a five-
minute delay before anyone noticed
the plane hadn t arrived, a gap in
which nobody pressed the alarm
button," he says.
Even if air traffic control did
notice the plane was amiss, they
wouldn t necessarily have made it
public, he adds.
The Civil Aviation Authority of
Vietnam says the plane failed to
check in as scheduled at 0121 with
air traffic control in Ho Chi Minh
City. However, an unnamed pilot
flying a 777 heading for Japan says
he briefly established contact with
MH370 minutes after he was asked
to do so by Vietnamese air traffic
6. Why isn't it easier
to track missing planes
by military satellite?
The search effort on seas some
2,500km to the south-west of the
Australian city of Perth has relied
on images provided by commercial
Dan Schnurr, chief technology
officer at Geospatial Insight, says
there are 20 known satellites that
have a resolution capable of
obtaining these images in the "vast
tracts of the ocean passing over
the poles". Of those, probably about
ten of them capture images on a
The images are beamed down
from the satellites in very near real
time, and are probably on the
ground within two or three hours
of image capture, he says. The
delay in detecting valuable images
is down to the time it takes to
analyse the large volume of
There are also satellite sources
owned by the military and gov-
ernment, but these have not been
prominent in the search. This has
led to some speculation that the
fate of the plane was known about
earlier in the search, but not
Laurence Gonzales, author of
flight 232: A Story of Disaster and
Survival, says some nations are
bound to have more sophisticated
surveillance systems than they are
letting on. "A very small, fast ballistic
missile can be picked up easily, so how
can they lose a big, slow-moving object
like a jumbo jet? It tells me somewhere
in the angles of power in the world
someone knows where the plane is but
doesn t want to talk about it, probably
for reasons of national security because
they don t want to reveal the sophis-
tication of the material they have... that
their satellite technology is so good it
can read a label on a golf ball," he says.
But Gratton says military satellites
looking for ballistic missiles probably
wouldn t have thrown up much useful
data because they wouldn t have been
calibrated to pick up aircraft of this size.
7. Did the plane glide into
the sea or plunge after
running out of fuel?
The MH370 s final moments seem
to depend on whether the plane was
still being flown by a pilot.
"If it was under control, the plane
was capable of being glided. The Airbus
that went into the New York s Hudson
River lost both engines, which is an
identical outcome to running out of
fuel, and the pilot managed to land on
the water," Gratton says.
Barry agrees there could have been
a gentle descent. "Aircraft of this size
will normally fly or glide over 50 miles
before they hit the sea if they run out
of fuel," he says. However, if no-one
was at the controls, he says the descent
could have been "pretty severe".
8. Would the passengers have
known something was wrong?
If a major malfunction had not
occurred, it is unclear whether pas-
sengers would have known anything
was awry, especially if there were no
obvious signs of a struggle onboard.
Joe Pappalardo, senior editor at Popular
Mechanics magazine, says in most sce-
narios where a plane flies off course
for hours, passengers can remain obliv-
ious. At 01:00, many would probably
have been asleep. In the morning, the
astute might have worked out the sun
was in the wrong position.
Malaysian authorities have said the
plane rose to 45,000ft, before falling
to 23,000ft, after it changed course. If
that s the case, passengers might have
felt the loss of altitude, according to
However one theory is that the
plane s apparent climb could have been
designed to induce hypoxia, oxygen
deprivation, which could have knocked
people unconscious and even killed
Wrigley thinks it could have played
out in one of two ways. "In the horror
story version passengers would have
realised something was wrong as the
plane climbed, and a decompression
event would have led to oxygen masks
coming down, and an awareness that
oxygen was limited. A better scenario
is they didn t know anything had hap-
pened until impact," she says.
9. Why didn't passengers
use their mobile phones?
One commonly asked question is
why, if it had been obvious something
was wrong, passengers wouldn t have
used mobile phones to call relatives
and raise the alarm. This seems espe-
cially puzzling in light of the example
of United flight 93, where passengers
communicated with people on the
ground after the plane was hijacked
It s been stated that it s extremely
unlikely that anyone could get mobile
signal on an airliner at 30,000 feet.
Barry agrees the chances of a mobile
phone working on the plane were "vir-
10. Why can't planes be set up to
give real-time data to a satellite?
Arguably the most baffling thing to
a layperson about the disappearance of
MH370 is how it is even possible for a
plane of this size to disappear so easily.
In an era when people are used to being
able to track a stolen smartphone, it s
perplexing that switching off a couple
of systems can apparently allow an air-
liner to vanish.
Barry says the technology exists to
allow planes to give off full real-time
data. The problem is planes are "snap-
shots in time from when they are
However, Gratton says ACARS would
have done the job if it hadn t been turned
off. A more complex satellite system
would also be open to that risk, he
argues, unless the industry wanted to
go with a system that couldn t be man-
ually switched off, and that would come
with other risks. (BBC)
Military satellites not
calibrated to find aircraft
Royal Australian Air Force Loadmasters Sgt Adam Roberts, left, and Flight Sgt
John Mancey, launch a Self Locating Data Marker Buoy from a C-130J Hercules
aircraft in the southern Indian Ocean as part of the Australian Defence Force's
assistance to the search for Malaysia Airlines flight MH370. AP PHOTO
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