Sonardyne UK (Head Office)
T. +44 (0) 1252 872288
F. +44 (0) 1252 876100
E. sales@sonardyne.com
www.sonardyne.com
Datasheet
Heavy Load DORT Acoustic Release Transponder
Description
The Type 8048 Heavy Load DORT
(Deep Oceanographic Release
Transponder) is a tough, reliable
acoustic release designed for
deployment in up to 7,000 metres of
water.
Key Features
•
Safe Working Load of 2½ Tonnes
•
7,000 Metre depth rated
•
Highly reliable, proven release
mechanism
•
Up to 3 years deployment
•
Excellent corrosion resistance -
Ferralium 255
•
Compact and rugged design
•
Mechanically compatible with
other release transponders
•
Choice of housing lengths to suit
deployment scenario
Standard features include a Safe
Working Load of 2,500Kg and a
spring-assisted release mechanism.
This type of release mechanism was
originally developed by Sonardyne
for navigation transponders supplied
to the offshore industry of which
there are now many thousands
reliably in service around the world.
Excellent corrosion resistance is
achieved by using Super Duplex
stainless steel, Ferralium 255. In
addition, the Heavy Load DORT is
available in different housing lengths
and is mechanically compatible with
other standard release transponders
on the market thus simplifying
mechanical integration.
Heavy Load DORTs are controlled
using frequency band specific
Lightweight Command Units (LCU)
which comprise of a dunking
transducer connected to either a
splash-proof PSION, PC running
supplied software or terminal
program. For security of operation, a
special coding system provides
protection against accidental release
by noise and acoustic transmissions
from other vessels.
Sonardyne UK (Head Office)
T. +44 (0) 1252 872288
F. +44 (0) 1252 876100
E. sales@sonardyne.com
www.sonardyne.com
Specifications
Heavy Load DORT Acoustic Release Transponder
Feature
Depth Rating
Operating Frequency
Transducer Beamshape
Transmit Source Level (dB re 1µPa @1m)
Receive Threshold (dB re 1µPa)
Safe Working Load (4:1)
Max Safe Release Load
Breaking Load
Battery Life (Listening)
Shelf Life (Battery Disconnected)
Stored at 25ºC
Mechanical Construction
Dimensions (LxDia)
Standard Housing
Short Housing
Weight in Air
Standard Housing
Short Housing
Weight in Water
Standard Housing
Short Housing
Deck Unit
Type 8048-000-01/02
7,000 Metres
LF (7.5–15kHz)
Hemispherical
190dB Alkaline, 184dB Lithium
85dB
2,500kg
2,500kg
10,000kg
Alkaline
Lithium
Long-life Lithium
9 months
24 months
36 months
Alkaline
Lithium
Long-life Lithium
24 months
84 months
120 months
Ferralium 255
832mm (32.75”) x 145mm (5.7”)
693mm (27.3”) x 145mm (5.7”)
37kg
32kg
27kg
24kg
Type 7667 LF Lightweight Command Unit
Definitions
Safe Working Load - The maximum
recommended working load. This is set as a
quarter (1/4) of the Breaking Load and makes
an allowance for factors such as corrosion,
fatigue and dynamic loads.
Release Load - The maximum in-line load that
the whole assembly can release whilst
guaranteeing safe and reliable operation.
Note that as the load is released in water, this
is determined by the maximum upthrust from
the buoyancy when used in a mooring
operation.
Breaking Load - The load that induces
structural failure in one or more parts of the
instrument causing the load to part from the
release mechanism.
Specifications subject to change without notice - 10/2006
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