{"product_id":"airmar-b285-medium-chirp-1kw-with-fairing-block-raymarine-11-pin-dt","title":"Airmar B285 Medium CHIRP, 1kW, with Fairing Block, Raymarine 11-Pin, DT","description":"\u003cp\u003eThe B285M's medium frequency delivers the ideal combination of coverage, extended depth range, and clean target and structure returns in mid to deeper water. Operating at 85–135 kHz with 50 kHz of total bandwidth, it reveals fish at depths up to 457 m (1,500') with ultra-clear target resolution and excellent bottom detail. Covers popular fishing frequencies of 88 and 107 kHz plus everything in between.\u003c\/p\u003e\n\u003cp\u003eAlso ideal for single-channel sounder applications — simply create presets for 85 and 135 kHz and toggle between wide and narrow beams for scouting and pinpointing structure. Includes a high-performance Fairing Block for optimal broadband performance at speeds over 30 knots. Available with an OEM connector or as a Mix and Match™ version.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDepth and fast-response water-temperature sensing\u003c\/li\u003e\n\u003cli\u003e1 kW power | Max depth: 457 m (1,500')\u003c\/li\u003e\n\u003cli\u003eMedium frequency: 85–135 kHz | Beamwidth: 16°–11° | 50 kHz total bandwidth\u003c\/li\u003e\n\u003cli\u003eCovers popular fishing frequencies of 88 and 107 kHz\u003c\/li\u003e\n\u003cli\u003eBronze housing — suitable for fiberglass or wood hulls\u003c\/li\u003e\n\u003cli\u003eRecommended for planing or displacement hulls\u003c\/li\u003e\n\u003cli\u003eIncludes high-performance Fairing Block for speeds over 30 knots\u003c\/li\u003e\n\u003cli\u003eAlso available as transom (TM185M), low-profile thru-hull (B175M), and in-hull (M135M) mounts\u003c\/li\u003e\n\u003cli\u003ePatented Xducer ID technology\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Band:\u003c\/strong\u003e Medium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Rating:\u003c\/strong\u003e 1 kW\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium Frequency:\u003c\/strong\u003e 85–135 kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium Frequency Beamwidth:\u003c\/strong\u003e 16°–11°\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle or Dual Frequency:\u003c\/strong\u003e CHIRP-Ready Single-Band\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunctions:\u003c\/strong\u003e Depth, Temperature\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Style:\u003c\/strong\u003e Thru-Hull with Fairing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTilted Element:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAcoustic Window:\u003c\/strong\u003e Urethane\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHull Material:\u003c\/strong\u003e Fiberglass or Wood\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Vessel LOA:\u003c\/strong\u003e 8 m (25') and above\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeadrise Range:\u003c\/strong\u003e Up to 28° with fairing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Deadrise:\u003c\/strong\u003e Up to 26° with fairing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector:\u003c\/strong\u003e Raymarine 11-Pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay Connector:\u003c\/strong\u003e 11R\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor Connector:\u003c\/strong\u003e MMC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMix and Match Series:\u003c\/strong\u003e 12-Pin CHIRP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Size:\u003c\/strong\u003e 30 mm (1-3\/16\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsable Shaft Length:\u003c\/strong\u003e 121 mm (4.75\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Length:\u003c\/strong\u003e 10 m (33')\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 4.2 kg (9.2 lb.)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Depth:\u003c\/strong\u003e 457 m (1,500')\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon Use:\u003c\/strong\u003e Fishing, Commercial Fishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Harrold Marine","offers":[{"title":"Default Title","offer_id":50112478544120,"sku":"B285C-M-11R","price":2359.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0068\/6656\/7225\/files\/Screenshot2026-08-05at4.21.57pm.png?v=1785910950","url":"https:\/\/www.bosunslocker.com.au\/products\/airmar-b285-medium-chirp-1kw-with-fairing-block-raymarine-11-pin-dt","provider":"Bosuns Boat","version":"1.0","type":"link"}