StarFish 450F is the affordable high performance towed side scan sonar which produces spectacular images of the seabed. The compact hydrodynamic full body three-fin design improves stability of the sonar while its being towed which helps further improve the quality of images it produces.


High Performance

Utilising advanced digital CHIRP acoustic technology developed from the professional underwater survey industry, StarFish 450F can view targets at longer ranges without any loss in image quality. It competes with many larger commercial systems, yet the intuitive software makes it very easy to use.


Simple Operation

The StarFish 450 Series is designed to be 'Plug and Play', connecting to your Windows PC or laptop via a USB connection. Small, light and rugged, the StarFish 450F can easily be operated by a single person. Simply deploy the sonar by hand and tow from your boat to capture and record real-time images of the seafloor below. Our user friendly software makes seabed imaging easy for everyone.


Portable System

Measuring less than 15 inches / 38cm long the StarFish 450F sonar is small enough to be transported in your rucksack. Lightweight and quick to deploy, the 450F towed system is independent of the boat requiring no fixed installation which makes it easy to transport and operate from any vessel.

Marine Distribution & Consulting offers the full range of Blueprint Subsea products. Please do not hesitate to contact us for detailed information to  find the right Side Scan Sonar solution for your application!

System Setup

Starfish system

The Sonar connects to the Top Box. The Top Box then connects to the power source and any Windows based PC or Laptop via a USB connection to display, record and playback digital sonar images using StarFish Scanline software.

  1. Starfish 450F Side Scan Sonar "Towfish" Transducer Head
  2. Starfish 450 Top Box (includes USB and power cables)
  3. 20m cable (included with StarFish 450F Sonar)
  4. AC Mains power adapter (supports 110V and 240V)
  5. Customer supplied DC power supply 9V-28V (i.e. battery)
  6. Customer supplied PC or Laptop (with at least 1 free USB port and Windows XP, Windows Vista or Windows 7)
Starfish deployment


  • The smallest towed side scan sonar available.
  • Pioneering hydrodynamic design.
  • Easily transportable - fits in your rucksack.
  • Plug & play USB interface to any PC.
  • Easily powered from almost any source.
  • Simple & intuitive software.


Customer images captured with the StarFish 450F sidescan sonar...


StarFish_450F_sidescan_sonar_image_1 StarFish_450F_sidescan_sonar_image_3 StarFish_450F_sidescan_sonar_image_2 StarFish_450F_sidescan_sonar_image_4 StarFish_450F_sidescan_sonar_image_6

StarFish 450F Towed Sidescan Transducer Head (with 20m cable attached)


Length 378mm (14.9")
Width 110mm (4.3")
Height 97mm (3.8")
In Air 2.0kg (4.4lbs)
In Water 1.0kg (2.2lbs)
Depth Rating...
Body 50m (164ft) max
Operating Frequency 450kHz nominal (430kHz-470kHz CHIRP)
Operating Range 1m to 100m (3ft to 320ft) on each channel providing max 200m (640ft) total coverage
Operating Mode CHIRP pulse compression
Pulse Length 400us typical
Towing Cable...
Length 20m (65ft) - attached to head (no in-line connector)
Breaking Strain >150kg (330.7lbs) Kevlar reinforced
Minimum Bend Radius 30mm (1.2")
Construction Black polyurethane jacketed with internal Kevlar reinforcing member
Body Reinforced black polyurethane rubber
Vertical Beam Width 60° nominal (@ -3dB signal level)
Horizontal Beam Width 1.7° nominal (@ -3dB signal level)
Arrangement Dual fin mounted transducers with 30° down angle from horizontal.
Transmit Source Power Level <210dB re 1µPa @ 1m






















Additionally available:



Bluepint SubseaMDCMarine Distribution & ConsultingStarFish 450F, underwater inspectionside scanning sonar, side scan sonarhigh resolution surveysportharbouracademic researchinland waterway, rivercanalSAR , Search And Recovery, Search and Rescue , MDCPoliceFire Fighter, Towfish, Sonar survey, affordable sonar, high performanceside scan,


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