-The
Falcon F2 configuration was first developed
to meet an operational requirement to
extend the maximum length of Falcon umbilical
from 500 metres to 1100m (3610 ft) for
deep penetration tunnel inspections. For
this particular application the client
needed 3 simultaneous video channels and
additional bandwidth to accommodate data
for an inertial navigation system and
survey sensors including sector scanning
and profiling sonars installed in an under-slung
survey/navigation skid.
In order to keep the umbilical
diameter to the minimum and accommodate
the increased volume of data to be transmitted,
it was necessary to use fibre optics for
the data and video.
The additional bandwidth
available in the Falcon F2 also makes
this the ideal configuration for the highest
quality camera systems including HDTV
and 3 CCD broadcast quality cameras.
With 16 kg payload and 50kg
of bollard pull, the F2 is easily capable
of carrying a dedicated navigation and
survey skid while overcoming the large
drag forces encountered when using a very
long umbilical.
Typical survey sensors that
are used in this type of application are
profiling sonars, sector scanning sonars
and a Digiquartz depth sensor as well
as video recording.
For the most accurate positioning
information a full inertial navigation
and mapping system can be provided installed
in an under-slung skid. Accelerometers
are combined with Ring Laser Gyro (RLG)
technology to produce accurate positional
data from a known reference point. Doppler
Velocity Logs (DVL) can also be integrated
to improve accuracy and reduce the effects
of drift.
The complete system allows
comprehensive surveys of wet tunnels,
easily integrating profiling sonar and
other sensor data into the 'electronic'
survey report.
We try
to provide the most up to date, recent
specifications on these ROV systems. However,
ROV system specifications are changing
all the time, so please double check with
the manufacturer to insure the specifications
are correct before making a decision in
using or purchasing these systems. |
