8048-000-03 Datasheet, PDF (1/2 Pages) Sonardyne sound in depth – P-DORT Acoustic Release Transponder

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Datasheet
P-DORT Acoustic Release Transponder
Description
The Type 8048-000-03
Programmable Deep Oceanographic
Release Transponder (P-DORT)
combines the features of a heavy
duty acoustic release transponder
with hardware to allow automatic
release at depth.
The P-DORT has two modes of basic
operation. Firstly, like a standard
DORT, it responds to securely coded
acoustic commands from the surface
in the LF (9-13 kHz) frequency band.
Key Features
• Acoustic and automatic ‘Release at
Depth’ operating modes
• Safe Working Load of 2½ Tonnes
(Options for heavier loads)
• Depth rated to 7,000 metres
• Highly reliable, proven release
mechanism
• Up to 12 months deployment
• Excellent corrosion resistance -
Ferralium 255
• Compact and rugged design
Secondly, it can be pre-programmed
prior to deployment to automatically
release when it reaches a certain
depth. This allows heavy items, such
as submarine cables for example, to
be lowered precisely to the seabed
and then the lowering apparatus
recovered after an automatic release.
The acoustic ranging function within
the P-DORT can also be used to
relocate the equipment should the
lowering cable fail.
The Windows-based control software
for the automatic depth mode runs
on a standard PC running Windows
98, ME, 2000 or XP and is
connected to the P-DORT using a
serial cable and interface box
There are two options for setting the
‘release at depth’ option. In the
primary mode, a depth is set and
once the unit passes that depth, the
unit will immediately release. The
secondary mode allows for shallower
depth to be set for when the primary
release depth has been erroneously
set to greater than the actual water
depth. Then, if the unit passes that
depth but remains stationary (i.e. on
the seabed) for a specified time, it
will release.