7832-000-01 Datasheet, PDF (1/2 Pages) Sonardyne sound in depth – ROV-Homer Target Relocation System

Sonardyne UK (Head Office)
T. [phone]
F. [phone]
E. [e-mail]
www.sonardyne.com
Datasheet
ROV-Homer Target Relocation System
Description
Part of Sonardyne’s Coastal Acoustic
product range, ROV-Homer is a
miniature range and direction
guidance system for small or large
ROVs. Based on proven acoustic
principles, it is specifically designed
for fast, efficient relocation of
underwater targets such as lost
diving bells, divers, seabed
equipment or small objects.
It enables points of interest to be
marked with an acoustic transponder
so that an ROV pilot can be guided
straight back to the target even in
zero visibility. The system
substantially reduces search time
and therefore operating costs.
The system consists of an ROV
mounted range and direction unit,
PC control software and small,
lightweight marker transponders.
Once the pilot has selected the target
he wishes to 'home' into, the ROV
unit begins interrogating the
designated transponder to determine
its range and direction. The
information is communicated back to
the surface, via the ROV's umbilical,
and is displayed on the user's PC. It
indicates the range to the target and
in which direction to turn in order to
fly the ROV directly towards the
selected transponder.
The ROV mounted unit is accurately
aligned with the ROV's heading
sensor and is connected to spare
cores either on the ROV's umbilical
or to the ROV's communications
multiplexer. The electronics inside the
unit incorporate power regulation,
an RS232 interface and a
microprocessor all of which are
galvanically isolated from the ROV's
electrical system. 12V to 24V DC
power supply is connected via the
same connector. On smaller ROVs
which do not have communications
multiplexers and therefore cannot
support RS232, a RS485 interface
can be provided.
The transponders are compact so
that they can be easily fitted to divers
or equipment and have a long life
battery pack making them ideal for
use as permanent markers. Each
transponder is individually encoded
enabling many transponders to be
used on the same site to
unambiguously mark many targets.
Key Features
• Simple, low cost acoustic guidance
system for ROVs
• 4,000 metre or 12,000 metre
versions available
• Reduces search time and ROV
operating costs
• Critical point marking - tools, valve
heads, field joints...
• Emergency relocation - divers,
diving bells, ROVs...
• Accurately measures distances of
up to 750 metres
• Allows operation in zero visibility
• System operates with up to 256
small, low cost transponders
• Works with AODC Emergency
Transponders