Ideal for commercial fishing vessels, the BSM-3 is a high performance, dual-channel broadband sounder with CHIRP technology. Its 3,000m (10,000ft) working range means you can venture further offshore, with the confidence to find the fish you’re looking for.

The BSM-3 is built for tough offshore conditions, with rugged all-aluminum housing. New transducer connectors make installation and service easier than ever, minimizing downtime and keeping you out on the water.

  • Professional fishfinder – sees fish at exceptional depths, with industry-leading target separation and clarity
  • Dual independent transceivers with dual transducer ports
    • Compatible with wide-angle transducers, for greater coverage of the water column
    • Combine Ultra‐Low, Low, Medium, or High Frequencies to suit your fishing area and target species
    • Any frequency you need: Broadband 25-45kHz, 40-60kHz, 130-210kHz, Narrowband 28kHz, 38kHz, 50kHz, 200kHz
  • Compression Modulation (CHIRP) for improved performance over all depth ranges
  • Penetrates up to 10,000 feet (3000 m)
  • Whispers into the water – locate fish without disturbance
  • Networked over high speed Ethernet
  • Rugged die-cast aluminium housing, waterproof to IPX6
  • Easy to install: Transducer connectors on housing minimize installation complexity
  • Easy to Use: Automatic settings optimized for everyday performance; manual settings for finer tuning


With support for standard narrowband and high performance broadband transducers, CHIRP technology, and 1kW/3kW transmit power for a 3,000m (10,000ft) effective range, the BSM-3 is Simrad Yachting’s top echosounder for deep-water commercial fishing.

Wide-Angle Transducers
The Simrad BSM‐3 works with a broad range of Airmar transducers, including its latest wide‐angle CHIRP series. These transducers provide a distinct advantage over traditional narrower beam angles when looking for targets in the upper water column – making the new transducers a perfect fit for targeting pelagic species. With a wider coverage area fish targets are easier to see, appearing larger and more distinct than ever before. Wide beam transducers also search a larger section of the bottom, making it easier to find structures and track the seafloor.

Dual Transceivers
The BSM-3 is fitted with dual transceivers and uses two separate transducers to transmit simultaneously on high and low frequencies. The longer pulse is transmitted for greater depth penetration and, as it requires less power than a higher frequency signal, it makes less noise. The result is a ‘whisper’ into the water that locates the fish without disturbing them. The higher frequency signal gives even finer detail at shallow to mid-water depths.

Combine any Ultra Low/Low frequency CHIRP transducer with any Medium or High frequency transducer, to best mark the species you’re targeting and the typical depths you’re fishing in. The wide range of compatible transducers means you can customize the frequency ranges, output power, and mounting style for any fishing application.

Larger Targets
With the ability to use up to an 8X scroll speed, BSM‐3 presents larger fish targets than competing echosounders. Combined with the Simrad BSM‐3’s industry leading target separation and clarity, the BSM‐3 offers a critical advantage when deep‐water fishing.

Rugged Build
The BSM-3 has a rugged die-cast aluminium housing, with IPX6-waterproof access cover for transducer wiring. Waterproof cable glands are included for use with bare-wire transducers, but new factory-fitted external connectors mean that with Airmar’s latest range of transducers, installation is as simple as plugging in a cable. Replace transceivers or swap out the BSM-3 for service quickly and easily, minimising downtime and keeping you out on the water.

The BSM‐3 is optimised for the Simrad HEROiC user interface, and is fully compatible with Simrad multifunction displays*. With the HEROiC interface, you can immediately see how your adjustments will affect the sonar image. Find the best settings for your needs, faster and easier than ever before.

 * The BSM‐3 is compatible with Simrad NSS, NSS evo2, NSE, NSO, and NSO evo2 series, with latest software updates installed. Some UI features unavailable on NSE and NSO Offshore models.



Output Power 250 Watts RMS / 2000 Watts peak to peak
Echosounder Max Depths

3,000m / 10,000ft

Echosounder Transducers

Standard Narrowband and High Performance Broadband (1kW/3kW) Transducers

Echosounder Frequencies

Broadband 25-45kHz, 40-60kHz, 130-210kHz, Narrowband 28kHz, 38kHz, 50kHz, 200kHz


Frequencies Broadband 25-45kHz, 40-60kHz, 130-210kHz, Narrowband 28kHz, 38kHz, 50kHz, 200kHz


Operating Temperature -15°C to +55°C
Water Resistance IPX5
Product Width 340mm / 13.4in
Product Height 100mm / 3.9in
Product Weight 4.8kg / 10.6lbs
Product Length [mm] 250mm / 9.8in (excluding connectors), 289mm / 11.4in (including connectors)


Power Consumption Range dependent, normally under 10W. Internal 3A fuse.
Power Supply (Supply Voltage) 12 or 24 V DC (max range 10.7 V to 32 V DC)