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GT56UHD-TH Thru-Hull Mount Transducer
This all-in-one transducer offers ultimate versatility, featuring Ultra High-Definition ClearVü and SideVü scanning sonars, high wide CHIRP traditional sonar, and more, so you can spend more time catching fish.
Get brilliant image clarity of structure and fish below your boat at greater depths than other high-frequency scanning sonars. It puts more power on targets via a downward-facing element. See everything the first time with stunningly clear images of structure and fish off to the sides of your boat. SideVü sonar now has a 20% greater range at 1,000 kHz, so you can see even farther than before.
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200 14th Avenue Southeast, St. Petersburg, FL 33701
7C San Bartola Drive, Saint Augustine, FL 32086




What a great little piece of tech - I don't know how we got by without it in the past. No more guessing how full the holding tank is or having to clean icky tank senders. This little bluetooth RADAR sending unit mounts on top of the tank and connects wirelessly to our Victron Cerbo.
Setup is super easy, push the button on the unit so it can calibrate to the tank then enable bluetooth and set up your rank dimensions on your Cerbo. It's as easy as that.
We've had it installed and running for about two weeks now and couldn't be more pleased (We like it enough that I ordered a second one for our water tank.)
Lots of wiring - no leaks! Be sure to run ALL the wires through BEFORE completing the run!
Installed on Yanmar 4JH57 engines with Zeus Controllers - HOLY WOW power. Losing some power at top end but overall very satisfied. Will do a long term review later. Talk about power - hope to never need my generator again!
We bought these boots in 2022, and are buying new ones 3 years later. We love the design and the fact that they are easy to remove for inspection of the rig.
Review for electrical system components:
• Victron Lithium Battery 24VDC 300Ah NG Smart LifePO4 (x4)
• Victron Lynx Smart BMS 500 NG (M10)
• Victron Lynx Distributor w/M10 Terminals (x2)
• Victron MultiPlus-II 24/5000 120-95 120V (x2)
• Victron Phoenix Smart IP43 Charger 24/25 (1+1) 120-240VAC (x5)
• Victron Cerbo GX MK2 w/ Victron GX Touch 70 Flush Mount Display
• Z Bar - Class T battery link Bundle w/ Blue Sea 5119 300AMP Class T Fuse (x4)
• Victron Orion XS 1400 DC-DC Battery Charger (x2)
• Victron SmartSolar MPPT Charge Controller - 100V - 30AMP - UL Approved (x4)
Complete upgrade of my Irwin 54 Sloop electrical system –
Phase 1 – Remove 9KW generator, install 30KW LifePO4 battery system, inverter chargers, battery chargers, etc. wired for worldwide shore power capability to ABYC standards. Installation made possible with guidance and support from Andre Cormier and The Yacht Rigger.

