Have you got a chirp sounder but not chirping yet ? 

Get yourself a chirp upgrade and get that fantastic target definition without slipping your boat.  By using an Airmar in hull chirp upgrade.

The M285HW, is a 1kW, economical Chirp transducer designed for offshore fishing and freshwater anglers. Operating at the high frequency range of 150-250kHz and a fixed wide beam of 25 degrees, these transducers reveal ultra-clear target resolution in shallow, murky waters at shallow to medium depths (up to 700 feet).

The transducer includes a plastic housing which is secured inside the hull of the boat and is filled with Eco-friendly anti-freeze. The transducer is inserted into the housing and adjusted for the proper dead rise offset,insuring the beam is shooting straight down. The liquid provides the best medium to transmit through the fiberglass and into the surrounding water. The benefits to the in-hull transducer are that there are no protruding features on the exterior of the hull making it the perfect choice for trailered or lifted boats. Designed for smaller boats up to 25’ with solid core,fiberglass hulls.

We use one of these on our demo boat and quite honestly say it the cleanest signal return and definition we have ever seen on a fish finder you wont be disappointed !  JGTech

  • Depth only
  • Chirp Ready High frequency (150-250kHz) for great offshore and inshore performance
  • 25° fixed beamwidth
  • 1 kW output
  • Depth range: to 700’ (215 meters)
  • Perfect for trailered or lifted boats
  • Urethane Housing- liquid filled
  • Exclusive Xducer ID®


  • Weight: 9.17 lb (4.16 kg)
  • Hull Deadrise: adjustable 2° to 20°
  • Acoustic Window: Urethane
  • For use on solid fiberglass hulls only

M285HW 1kW – Broadband
Chirp-ready across the following frequency band:
High-Frequency: 150-250 kHz Constant 25° Beamwidth Hull Deadrise: 0° to 22°
Lowrance, Simrad 7 pin Blue connector or Xsonic 9pin black connector

Airmar Part 41-818-1-01 plus 33-1394-01

Call us for any advice on chirp transducers and model or the make of unit you have. 

For sale by authorised Airmar, Navico, Lowrance award winning service dealer.

JG Technologies Ltd.,   Weymouth, Dorset UK

Over 20 years selling Marine Electronics

Airmar M285HW Chirp In hull transducer for Navico Xsonic chirp sounders

  • Brands Airmar
  • Product Code: Airmar M285HW Xsonic
  • Availability: In Stock
  • £1,199.00

  • Ex Tax: £999.17