Bathyswath-2-UW (left) and Bathyswath-2-STD (right)

UW for underwater & STD for Standard

Bathyswath-2-STD image shows the IP67 Deck Unit (DU), a 234 kHz transducer (bottom with a pen as size reference) and a 468 kHz transducer (top)



Technical Information Document  


Bathyswath is a comprehensive bathymetric & seabed mapping survey system, derived from the established & respected SWATHplus system, now renamed as Bathyswath 1. Bathyswath 2 is the latest generation of our bathymetric systems.

You will not find lower prices for a similar quality (IHO standards compliant, bathymetry and sidescan).

  • Bathyswath uses wide swath widths, this increases survey speeds significantly, especially in shallow water.
  • It has 3 frequencies: 1 1 7, 234 or 468 kHz to be used respectively up to 350, 200 & 80m of water depth.
  • The US Geological Survey (USGS) said: “Operating swath of the bathymetric system ranged from 15 to 20 times water depth in in depths less than 15m”.



  • Bathyswath-2 transducers include a signal pre-amplifier so that the distance between the transducer and its electronics (located inside the Deck Unit [DU] or the Subsea Unit [SU]) is no more limited to 20m only. Bathyswath-2 transducers are also smaller
  • Bathyswath-2 electronic components are from the latest generation and are less noisy. Bathyswath-2 TEM (Transducer Electronic Module) consists of one PCB only that can accept up to 3 transducers (It is 1 board per transducer with Bathyswath-1)
  • Bathyswath-2 TEM is compatible with all 3 frequencies (117, 234 and 468 kHz).
  • Bathyswath-2 Subsea Unit [SU] is depth rated to 300 or 2000m, the Deck Unit [DU] is IP67
  • Bathyswath-2 Subsea Unit [SU] can be sold as a fully integrated low cost system (including the following options: INS, SVS and/or Pan&Tilt motor)
  • Gap filling (Interferometry): Bathyswath-2 (like SWATHplus) can accept a third transducer for this purpose and is also compatible with a specific multibeam sonar used as gap-filler



  Bathyswath-2-STD Bathyswath-2-UW
  Standard Underwater
Transducers 1 to 3 1 to 2
Transducer extension cables 1 to 3 option
Transducer mounting bracket Yes Yes
Transducer Interface Unit [TIU]    
IP 67 Deck Unit [DU] or
Yes No
Subsea Unit [SU]
No Yes
Ekinox-E Inertial Navigation System [INS] No option
MiniSVS Sound Velocity Sensor (SVS) No option
Umbilical cable option Yes
Spider cable (Connections to PC & Power) Yes Yes
SWATH software (data acquisition, processing & 3D visualisation; unlimited licenses) Yes Yes
Rugged transit cases Yes Yes
12 month return-to-base warranty Yes Yes
PicoMBES gapfiller Sonar (42° swath sector, 64 beams) option option



Bathyswath is compatible with most GNSS, INS, SVS devices but these are the ones proposed for our integrated package.

Ekinox-E INS
• MEMS technology, ITAR free, Kalman filter
• Pitch & Roll: 0.05° RMS
• Heading: 0.05° RMS with Dual Antenna GPS
• 3 axis gyroscopes (Range: 300°/s),
• 3 axis accelerometers (Range: 5g)
• 3 axis magnetometers (Range: 6 Gauss)

PicoMBES - MultiBeam
• 42° swath sector
• Beam width: 1° x 1°, 64 beams @ 0.7°
• Resolution: 2cm, 5ms pulse length
• 500 kHz
• Range: 120m max.


miniSVS - OEM
• 25mm path length
• Resolution 0.001m/s
• Range: 1 375-1 900m/s



Bathyswath data acquisition and processing software is included in system price but you can also interface to 3rd party software systems such as QINSy, SonarWiz, CARIS, Hypack, Fledermaus, Starfix and PDS2000.




2 types of mounts are proposed: A Universal Mounting Kit to allow deployment on vessel of opportunity and a Side Mounting Kit for installation on RIBs. Note: Bathyswath system is supplied with a V-bracket for 2 or 3 transducers.

Side Mounting Kit (for RIBS)                                          

Side Mounting Kit for (Ribs)                                                                                Transducer Mounting Kit



117 kHz
234 kHz
468 kHz
Operational slant range (m)
Maximum slant range (m)
Minimum depth (m)
Measurement resolution limit (mm)
Resolution detection limit
Across track resolution (cm)
Beam width, azimuth (2-way)
Transmit pulse length (µs)
17 to 8500
8.5 to 4300
4.3 to 2100
Deck unit dimensions (mm) 256 x 145 x 145 256 x 145 x 145 256 x 145 x 145
Transducer dimensions (mm) 550 x 200 x 70 340 x 100 x 55 230 x 60 x 40
Transducer weight in air (kg) 8.6 5 1
Transducer weight in water (kg) 1.3 0.8 0.1
Max. cable length (m) >50 >50 >50



Bathyswath-2 234 kHz Transducer

Bathyswath-2 468 kHz Transducer


Technical Information Document