7807 Datasheet, PDF (1/2 Pages) Sonardyne sound in depth – RovNav Mk4 LBL Transceiver (Discontinued)

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Datasheet
RovNav Mk4 LBL Transceiver (Discontinued)
Description
Sonardyne's RovNav Mk4 is an
underwater Long BaseLine (LBL)
acoustic transceiver designed to
accurately and rapidly position
Remotely Operated Vehicle's (ROV's)
and towfish. By measuring ranges to
a seabed transponder array and
calculating the time taken to receive
each reply, the position of the mobile
relative to the array can be
determined. A digital link with the
survey computer ensures fast position
updates and that reliable
communications with the RovNav
can be maintained even down long
umbilical in deepwater.
Depending on the positioning
accuracy and range required,
RovNav is available in three
frequency versions. Medium
Frequency (16-36kHz) gives ranges
of up to 3km and a relative
positioning accuracy of ±0.15m.
Extra High Frequency (50-110kHz)
gives ranges to 1km with relative
positioning accuracies of ±0.05m
whilst Low Frequency (8-16kHz) can
range up to 10km.
Note: All ranges are dependant
upon on local operating conditions
and water depth.
Key Features
• Depth rated up to 4,000 Metres
(MF)
• Baseline measurements <5cm (EHF)
• 12 channel receiver for fast
position updates
• RS 232/RS485 half duplex
communications via ROV's
umbilical
• Two remote transducers enable
sequential position fixing
• Compact and rugged design
• Incorporates depth, temperature
and salinity sensors (optional)
RovNav features a 121 channel
receiver for ranging to LBL
transponder arrays and the
command set is Sonardyne PAN
compatible. Two transducers can be
connected to the RovNav for added
redundancy or sequential position
fixing. In the event of power failure,
the unit automatically reverts to
transponder mode to enable the
emergency relocation of the lost ROV
or towfish.