{"product_id":"chcnav-hn-400m-dual-frequency-multibeam-echosounder","title":"CHCNAV HN-400M Dual-Frequency Multibeam Echosounder","description":"\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe CHCNAV HN-400M is a compact dual-frequency multibeam echosounder designed for professional hydrographic surveys in demanding conditions — turbid water, depth variation and vessel motion included. Dual-frequency operation at 400 kHz and 550 kHz delivers both high-resolution shallow-water performance and improved penetration at depth or in turbid conditions from a single instrument. A 0.03° high-precision integrated IMU provides centimetre-level real-time motion compensation, maintaining survey line continuity at up to Sea State 3 — suppressing vessel roll, pitch and heave to prevent broken survey lines in offshore harbour conditions. At 145° swath coverage and up to 6 times water depth, the HN-400M significantly reduces the number of survey lines needed for complete coverage. Calibration-free installation means it's ready to survey immediately on arrival at site, with full field control via CHCNAV EasySail in one touch. \u003c\/span\u003e\u003c\/p\u003e","brand":"CHCNAV","offers":[{"title":"Default Title","offer_id":55009692909897,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1022\/7482\/6569\/files\/HN-400m.webp?v=1786610772","url":"https:\/\/surveyequipment.uk\/products\/chcnav-hn-400m-dual-frequency-multibeam-echosounder","provider":"Tri-Site Survey Equipment","version":"1.0","type":"link"}