Garmin GT30-THP SS Thru-Hull Pair DownVü/SideVü Scanning Transducer w/Temp f/Hull Deadrises 5°-25°
Garmin GT30-THP SS Thru-Hull Pair DownVü/SideVü Scanning Transducer w/Temp f/Hull Deadrises 5°-25° — Product description
Upgrade your boating experience with the Garmin GT30-THP thru-hull transducer pair, engineered for boaters who demand razor-sharp imaging beneath and beside their vessel. These stainless steel transducers deliver CHIRP ClearVü and SideVü scanning sonar that paints vivid, photo-like pictures of fish, structure, and underwater terrain—perfect for shallow-water anglers chasing trophies in rivers, bays, or coastal flats.
What sets this pair apart? Dual port and starboard units with robust stainless steel stems ensure corrosion resistance in harsh saltwater environments, while the thru-hull design minimizes drag and interference compared to transom mounts. Built-in temperature sensors provide real-time water temp data, helping you pinpoint thermoclines where fish school up.
Precision Performance for Every Hunt
- Ultra-Wide Coverage: ClearVü scans up to 750 feet straight down with beamwidths of 1.4° x 53° at 455 kHz or 0.8° x 30° at 800 kHz. SideVü reaches 500 feet to each side (1.1° x 53° at 455 kHz, 0.7° x 30° at 800 kHz), revealing hidden drop-offs and bait balls without turning your boat.
- Powerhouse Output: 500W per element (1,500W total) punches through murky water for crystal-clear returns, even in choppy conditions.
- Versatile Hull Fit: Matches deadrises from 5° to 25°, ideal for planing hulls like bass boats, center consoles, or offshore cruisers.
- Plug-and-Play Simplicity: 12-pin connectors with included Y-cable link seamlessly to your sonar black box, plus 5 ft. cables extendable by 30 ft. for clean routing.
Pair these with a compatible scanning sonar module to unlock forward-facing capabilities on select chartplotters, turning guesswork into targeted strikes.
Pro Tips for Flawless Installation
Mounting thru-hull transducers demands precision to avoid hull damage and ensure optimal beam projection. Start by selecting spots amidships, below the waterline, away from strakes or thru-hulls that could shadow signals. Use the included fairing blocks to align beams parallel to the keel—critical for accurate side imaging on angled hulls.
Pro advice: Dry-fit everything topside first. Drill slowly with a hole saw matched to the stem diameter, seal with marine-grade sealant, and bed the isolation bushings to dampen vibration. Test in shallow water post-install to calibrate beam spread. This setup often outperforms inboard mounts for cleaner down-looking views during high-speed trolling.
Technical Specifications at a Glance
| Specification | Details |
|---|---|
| Frequency | ClearVü/SideVü CHIRP: 455 kHz (425-485 kHz) & 800 kHz (790-850 kHz) |
| Power | 500W per element (ClearVü/SideVü) |
| ClearVü Beamwidth | 1.4° x 53° @ 455 kHz / 0.8° x 30° @ 800 kHz |
| SideVü Beamwidth | 1.1° x 53° @ 455 kHz / 0.7° x 30° @ 800 kHz |
| Max Depth | ClearVü: 750 ft / SideVü: 500 ft |
| Sensors | Depth & Temperature |
| Pins / Cable | 12-pin / 5 ft + 30 ft Y-extension |
| Hull Deadrise | 5° to 25° |
Real-World Wins for Serious Anglers
Picture this: You're probing a weed-choked flat at dawn. ClearVü slices through to show suspended reds hugging the bottom, while SideVü flags snook ambushing along a subtle ledge 300 feet starboard—no circling required. Or drift wrecks in 200 feet: Spot structure ghosts and bait clouds that traditional sonar blurs.
These aren't just specs; they're game-changers for kayak guides, tournament pros, or weekend warriors dialing in patterns faster than competitors.
Frequently Asked Questions
What hull types work best with the Garmin GT30-THP transducers?
Designed for deadrises between 5° and 25°, they're ideal for V-hulls on bass boats, bay craft, and offshore center consoles. Avoid extreme deadrise angles over 25° to prevent beam distortion.
How does ClearVü differ from traditional sonar?
ClearVü uses CHIRP technology for photo-like down views, revealing baitfish separation and bottom composition that cone-shaped sonar misses—crucial for structure fishing.
Can I use these on a boat with an inboard engine?
Yes, but mount forward of props and shafts to dodge interference. The thru-hull placement often yields better high-speed performance than transom units.
What's included in the kit for easy setup?
Port and starboard 12-pin transducers with stainless stems, isolation bushings, fairing blocks, Y-cable, mounting hardware, and detailed instructions.
Do they measure water temperature?
Absolutely—fast-response sensors deliver accurate surface temps, helping locate bait balls and predator hotspots influenced by thermal shifts.
How deep can SideVü scan effectively?
Up to 500 feet left and right, depending on conditions. Optimal in clearer water; murky setups may limit range slightly.
Are stainless steel stems worth it over plastic?
In saltwater, yes—SS resists corrosion and impacts better, extending lifespan for serious offshore use.
Get ultra-clear sonar pictures of objects, structure and fish that pass below and to the side of your boat with these 12-pin thru-hull transducer with stainless steel stems.
These transducers with built-in fast response temperature sensors have a power rating of 500 W per element (1,500 W total); a depth of 750 ft (DownVü) and 500 ft left and right (SideVü); an operating frequency of CHIRP 455/800 kHz; for hull deadrises from 5 degrees to 25 degrees. Pair them with your GCV™ 10 scanning sonar module.
Includes 12-pin port and starboard transducers with stainless steel stems, isolation bushings, fairing blocks, Y-cable, mounting hardware and installation instructions. Follow the instructions carefully to avoid damaging your boat.
Compatible Devices:
- GCV™ 10 Scanning Sonar Module
Through these 12-pin threaded hull sensors with stainless steel rods, ultra-clear sonar images can be obtained. These images are used for objects, structures and fish to pass under and side of the ship, and through the side of the ship. ...
SKU: NVN-59891
MPN: 010-01961-11
UPC: 753759152819
Technical specifications
| Brand | Garmin |
| Model | Garmin GT30-THP SS Thru-Hull Pair DownVü/SideVü Scanning Transducer w/Temp f/Hull Deadrises 5°-25° |
| SKU / MFR# | 59891 |
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