{"title":"Marine Systems","description":"\u003cp\u003eComplete marine and hydrographic survey systems, from unmanned surface vehicles to integrated sonar and positioning. Map depths and features across lakes, rivers, reservoirs and coastal waters quickly and safely, even in shallow or hazardous areas. Supplied and supported in the UK by Tri-Site Survey Equipment.\u003c\/p\u003e","products":[{"product_id":"chcnav-apache3-pro-usv","title":"CHCNAV Apache3 Pro Single-Beam USV","description":"\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe CHCNAV Apache 3 Pro is a compact, autonomous unmanned surface vehicle designed for bathymetric surveys in shallow water environments. Weighing just 6 kg and operable by a single person, it deploys rapidly on rivers, lakes, reservoirs, and canals where larger vessels cannot operate. Integrated GNSS RTK and INS navigation maintains precise positioning even when satellite signals are blocked - under bridges, along urban waterways, and in confined channels - while the CHCNAV D270 single-beam echosounder delivers depth accuracy to within 1 cm.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"CHCNAV","offers":[{"title":"Default Title","offer_id":54870733259081,"sku":null,"price":33450.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1022\/7482\/6569\/files\/apache_3_pro.webp?v=1786547086"},{"product_id":"chcnav-apache4-pro-usv","title":"CHCNAV Apache 4 Pro USV","description":"\u003cp\u003eThe CHCNAV Apache 4 Pro is an unmanned survey vessel (USV) for hydrographic and bathymetric surveys of inland and coastal waters. Carrying single- or multi-beam sonar, it maps depths quickly and safely, including in shallow or hazardous areas. Supplied and supported in the UK by Tri-Site Survey Equipment.\u003c\/p\u003e","brand":"CHCNAV","offers":[{"title":"Default Title","offer_id":54870733291849,"sku":null,"price":43950.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1022\/7482\/6569\/files\/d84ae90b-APACHE-4-PRO_LeftView-scaled.png?v=1786547003"},{"product_id":"apache-6-usv","title":"CHCNAV Apache 6 USV","description":"\u003cp\u003eThe CHCNAV Apache 6 is an unmanned survey vessel (USV) for efficient hydrographic and bathymetric surveys of lakes, rivers, reservoirs and coastal waters. Carrying sonar payloads, it maps depths and features quickly and safely, reaching shallow or hazardous areas crewed boats can't. Supplied and supported in the UK by Tri-Site Survey Equipment.\u003c\/p\u003e","brand":"CHCNAV","offers":[{"title":"Default Title","offer_id":54870734012745,"sku":null,"price":67950.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1022\/7482\/6569\/files\/APACHE_6_2025_LeftView.png?v=1786546981"},{"product_id":"chcnav-d60-dual-frequency-echo-sounder","title":"CHCNAV D60 Dual Frequency Echo Sounder","description":"\u003cp dir=\"ltr\"\u003e\u003cspan\u003eLaunched April 2026, the CHCNAV D60 is an integrated dual-frequency echo sounder engineered for USV bathymetric operations. Operating at both 200 kHz and 33 kHz simultaneously, it covers a measurement range from 0.2 metres to 1,000 metres — handling shallow-water estuarial work and deep-water profiling from the same instrument. Integrated attitude and temperature sensors provide real-time compensation for vessel motion and sound velocity variation, while adaptive algorithms automatically adjust system parameters within 0.2 seconds — maintaining consistent data quality in turbid water, areas with rapid depth transitions and challenging survey conditions without manual intervention. At 1.2 kg with quick installation and removal, it is designed to minimise payload impact on compact USV platforms. \u003c\/span\u003e\u003c\/p\u003e","brand":"CHCNAV","offers":[{"title":"Default Title","offer_id":54985085813065,"sku":null,"price":1.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1022\/7482\/6569\/files\/D601.webp?v=1786460123"},{"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"},{"product_id":"chcnav-hq-400m-integrated-multibeam-echosounder","title":"CHCNAV HQ-400M Integrated Multibeam Echosounder","description":"\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe CHCNAV HQ-400 is a compact, fully integrated multibeam echosounder in a 12.5 cm cubic form factor weighing just 2.7 kg -\u003c\/span\u003e\u003cspan\u003ecombining sonar, temperature sensor, attitude sensor, positioning sensor and compass in a single all-in-one hardware package with no complex wiring and ready to use straight from the case. With 512 beams (digitally expanded to 1,024) and 140° swath coverage, it delivers dense, full-coverage bathymetric data across rivers, lakes, ports and dredging sites.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e T\u003c\/span\u003e\u003cspan\u003ehe built-in calibration-free IMU saves 50% of preparation time compared to traditional multibeam setups, and is stable even with poor satellite reception or wave turbulence - providing reliable data output in complex water conditions. GNSS PPK support ensures accurate positioning even where live RTK corrections are unavailable. \u003c\/span\u003e\u003c\/p\u003e","brand":"CHCNAV","offers":[{"title":"Default Title","offer_id":55010564735305,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1022\/7482\/6569\/files\/3-1.png?v=1786105019"},{"product_id":"chcnav-hn-400m-dual-frequency-multibeam-echosounder-copy","title":"CHCNAV D270 Single-Beam Echosounder","description":"\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe CHCNAV D270 is a portable, cost-effective single-beam echosounder designed for precise depth measurement in rivers, reservoirs, lakes and coastal areas. Operating at 200 kHz with a measurement range to 200 metres, it integrates a built-in water temperature sensor that continuously corrects sound velocity in real time - removing one of the most common sources of depth measurement error without any manual calculation. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eRunning on a Linux platform with web-based parameter configuration and chart plotting, the D270 is straightforward to deploy and operate. With 8GB of onboard storage and Bluetooth and Wi-Fi wireless connectivity, it handles extensive survey sessions without external hardware. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e \u003c\/p\u003e","brand":"CHCNAV","offers":[{"title":"Default Title","offer_id":55010820686153,"sku":null,"price":1.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1022\/7482\/6569\/files\/CHCNAV_Product_Shopify_2048_White_02.png?v=1786107318"},{"product_id":"chcnav-d390-single-beam-echosounder","title":"CHCNAV D390 Single-Beam Echosounder","description":"\u003cp dir=\"ltr\"\u003e\u003cmeta charset=\"utf-8\"\u003eThe CHCNAV D390 is a portable, professional-grade single-beam hydrographic system combining echosounder hardware, a 12-inch display and CHCNAV's HydroSurvey software in a rugged aluminium enclosure. Rather than sourcing separate data collection hardware, the D390 is a complete, self-contained system — transducer, controller, display and software integrated and ready to deploy. With DGNSS and RTK positioning input support, it delivers georeferenced depth data suitable for professional hydrographic survey without an external data logger. The rugged aluminium enclosure withstands the physical demands of marine fieldwork, and the 12-inch display provides clear data visualisation in outdoor conditions.\u003c\/p\u003e","brand":"CHCNAV","offers":[{"title":"Default Title","offer_id":55011403399497,"sku":null,"price":1.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1022\/7482\/6569\/files\/chcnav-d390-integrated-single-beam-echosounder.png?v=1786605861"},{"product_id":"chcnav-rs-1200-adcp","title":"CHCNAV RS-1200 ADCP","description":"\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe CHCNAV RS-1200 is a high-accuracy Acoustic Doppler Current Profiler for precise water velocity measurement in rivers, channels and coastal environments. Using a 5-beam configuration at 1,200 kHz with a 300 kHz central bathymetric beam, it delivers velocity accuracy of 0.25% ±2 mm\/s across profiling ranges from 0.1 to 40 metres, with a cell size as fine as 2 cm for near-surface resolution. Fully automated measurement mode eliminates manual configuration of flow parameters, and onboard data storage of 32GB keeps extended survey sessions independent of external devices. Compatible with the CHCNAV Apache 4 USV for one-person remotely operated river discharge measurement. \u003c\/span\u003e\u003c\/p\u003e","brand":"CHCNAV","offers":[{"title":"Default Title","offer_id":55011652272457,"sku":null,"price":1.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1022\/7482\/6569\/files\/rs1200.webp?v=1786457984"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1022\/7482\/6569\/collections\/Tri_Site_Apache_4_shoot_-0988.jpg?v=1786092178","url":"https:\/\/surveyequipment.uk\/collections\/marine-systems.oembed","provider":"Tri-Site Survey Equipment","version":"1.0","type":"link"}