The U-28 system was designed to provide communication between divers in limited bandwidth environments while maintaining diver safety and medical limitations. It uses 3 transmission levels to nearly triple operational range compared to other systems. The U-28B has an active acoustic antenna that reduces underwater noise to increase signal to noise ratio. The wrist unit can also be left underwater for over 30 days in passive mode, allowing divers to navigate to its location, ideal for caching equipment or returning to a spot.

1. UDI28SYSTEM
The U-28 system has been designed to pro-
vide communication protocol in a very limited
bandwidth (~35 KHz) while maintaining diver
safety and medical limitation.
The hardware provides 3 levels of transmis-
sion, enabling the diver to almost triple the
operational range. The architecture includes
DSP, digital sensors, depth transducer, com-
pass and accelerometers.
The U-28B has an “active” acoustical antenna
which contains special electronics that reduc-
es the level of underwater noise, thus increas-
ing the signal to noise ratio.
The U-28 wrist unit can also be configured
with an extended battery and left underwater
in a passive mode for 30 days or longer, ideal
for caching equipment and/or returning to a
set location underwater. By using the remote
SOS activation from another wrist unit, a
diver can navigate directly to the underwater
device’s location.
CRITICAL MISSIONS
SPECIAL FORCES, POLICE,
COAST GUARDS, RESCUE
UNITS, TECHNICAL DIVERS
UDI 28
FEATURES
U N D E R W A T E R
T E C H N O L O G I E S C E N T E R
Primary Business Address
8 Omarim, St., Baran Bldng, POB
3003, Industrial Park, Omer, Israel
84965Phone: +972 722 153 153
E-mail: golan@utc.co.il

2. Technical Specifications
WRISTUNITBOATUNIT
U N D E R W A T E R
T E C H N O L O G I E S
C E N T E R
Primary Business Address
8 Omarim, St., Baran Bldng, POB
3003, Industrial Park, Omer, Israel
84965
Phone: +972 722 153 153
E-mail: golan@utc.co.il
Up to 28 divers in one network.
Diver to diver text messaging, up to 28 text messages.
Diver to Boat Unit and vis-versa text messaging.
SOS signals and tracking to diver in distress; or navigation to a
device with up to 1500m range and 70 m depth.
Remote pinging signals from Boat Unit to diver in order to pro-
vide direction to Diver.
Transmission of small footprint SONAR imaging through the
Diver communicator.
Transmission from Boat unit to air
(RF communication module*).
*In some cases (as it may be appropriate) to use encryption.
*RF module (requires upgrade kit).