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be able to drive the average car over
it). Its diameter should be at least
twice the length of the largest
helicopter to use it, including rotors,
as you will need to turn round your
tail. Watch out for anything that may
snag the skids, particularly on
takeoff. Some people like the
touchdown area marked with an H,
but provided the grid reference is
accurate enough, it shouldn't be too
hard to find it.
If you're wanting to land where
there's a gathering of 1000 or more
people at an organised event,
remember that no landings at
unlicensed sites should be
undertaken within 3000' of that
assembly without written permission
from the CAA and the event
organisers (as per Rule 5 (1) d (i)).
On an oil rig, the helideck frequently
will be sloped away from the centre,
to help with drainage. The slope is
60 Operational Flying
not severe, but if you land with your
nose up the hill, so to speak, you run
the risk of hitting the tail rotor
against the perimeter fences.
Landing “downhill” will artificially
raise the tailboom away from them,
as will a slight forward movement
when you touch down.
Finally, a couple of points to watch
if you’re ever tempted to land across
or near railway lines, as you might if
they’re the only firm place around.
The first is that your skids more
often than not will complete an
electrical connection used for
signalling, and you may cause some
confusion in the local signal box.
The other is that trains do use the
track outside of published schedules,
so don’t be surprised to see a
humungous diesel bearing down on
you unexpectedly.
Airways Manuals
You need a route guide so you can
get around the airway system
without messing things up for
anybody else.
The ultimate Airways Manual is the
Air Pilot, being the source from
which others get their information.
If you ever end up in court, this will
be the one introduced in evidence,
but that's not to say that others are
no good. They're all potted versions
of it to varying degrees, but with
better presentation. You can even
produce your own, which is more
economical if you have only one or
two routes to cater for.
The commercially available ones are
really as good as each other,
whichever one you get started on
probably becoming your favourite.
In addition to the best known ones,
Jeppesen and Aerad, the RAF do their
own as a little sideline, which are
worth a look at. All of them,
however, may contain non-approved
letdowns, so inclusion of a
procedure in a Flight Guide (other
than the UKAP) doesn't necessarily
mean it can be used for Commercial
Air Transport flights.
The above guides are intended for
IFR work—for VFR you'll need to
carry your trusty Pooley's or Flyer’s
Guide or, if you're wealthy,
Bottlang's, but Bottlang's doesn't
carry helipad information.
Operating Minima
There are weather conditions under
which you're not allowed to land,
attempt to land, or take off. A
minimum cloud base and visibility
will be laid down, based on the
navaids available, terrain, obstacles,
type of aircraft, crew experience and
State legislation. You don't have to
do all the hard work; the above
Airway Manuals will have all the
calculations done for you, but how
they are derived is described below
in case you have to roll your own.
These regulations aren't only for
safety, they also save your customers
money and inconvenience. Speaking
from experience, if you find the
departure time creeping back
because of weather, after about two
hours, advise them to go 24 hours
later. They're still going to take the
same time at the destination—after
all, there is a job to do which is the
whole point of them going. If you
don't, you will find the day getting
unacceptably long and the Company
will still clock you on thirty minutes
before take-off, regardless of the
time you came in. Some companies
Operational Procedures 61
will pressure you into going just to
get the money, knowing you won't
get anywhere. In this case, leave the
choice up to the clients. Offer no
guarantees, but point out that there
will still be a charge if the whole
exercise is a waste of time. You
therefore pass the ball into their
court, and there's a chance you will
be appreciated for not wasting their
time, which must be expensive
　
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