Garmin ECHOMAP Ultra 2 166sv with GT56UHD-TM Transducer (010-03386-01)

🐟 Flagship 16" ECHOMAP Ultra 2, the largest ECHOMAP in Garmin's lineup. Premium tournament-rig and sportfishing territory. Priced at $4799.

Garmin ECHOMAP Ultra 2 166sv 16" Fish Finder with Transducer

The Garmin ECHOMAP Ultra 2 166sv is the flagship 16-inch ECHOMAP, the largest ECHOMAP Ultra 2 display and the top of Garmin's ECHOMAP line. This 16" touchscreen is premium multi-display rig territory, built for tournament pros running tower consoles, offshore sportfishing captains, charter operations, and premium multi-display rigs who need the largest ECHOMAP screen available. Above this tier, buyers step into Garmin's GPSMAP 8000-series (different product family entirely). Below it, the ECHOMAP Ultra 2 10"/12" tier handles most premium bass boat and center console needs. The 16" is specifically for tournament rigs, sportfishers, and charter boats where display real estate and multi-split-screen readability matter more than console size. The included GT56UHD-TM transom-mount transducer is Garmin's Ultra High-Definition flagship transducer. At the 16" flagship tier, many buyers also add a thru-hull transducer for offshore use, the GT56UHD-TM serves as either a primary or backup depending on the vessel.

This model ships with Navionics+ U.S. Inland + Coastal maps pre-loaded (keyed), making it ideal for anglers who fish both inland reservoirs and coastal waters and want premium pre-loaded cartography. Like the rest of the Ultra 2 tier, it's fully LiveScope Plus, LiveScope XR, and LiveScope Original compatible via the GLS 10 black box, supports Panoptix PS22/PS31 live sonar directly (no black box needed), and runs on the full Garmin Marine Network (Ethernet).

Key Features

• ✅ 16" Ultra-Bright IPS Display, flagship-tier brightness, edge-to-edge glass, premium touch construction
• ✅ GT56UHD-TM Transducer Included, Ultra High-Definition CHIRP + ClearVü + SideVü
• ✅ Ultra High-Definition ClearVü & SideVü, the largest ECHOMAP display for side imaging detail
• ✅ High-Wide CHIRP Sonar, wider beam for trolling and covering water
• ✅ Built-In GPS + U.S. Inland + Coastal, flagship-tier cartography
• ✅ Quickdraw Contours, create 1-foot contour maps of unmapped waters
• ✅ LiveScope Plus / XR / Original Compatible, via GLS 10 black box
• ✅ Panoptix PS22 / PS31 Direct Connection, no black box needed for Panoptix
• ✅ Full Garmin Marine Network (Ethernet), primary display role in networked rigs: radar, cameras, autopilot, multi-display sharing
• ✅ Wi-Fi + ActiveCaptain App, wireless software updates, waypoint sharing, smart notifications
• ✅ NMEA 2000 Networking, engines, trolling motors, sensors, fuel management
• ✅ Dual microSD Card Slots, expand with LakeMaster VX, CoastMaster Premium, C-MAP Genesis Edge
• ✅ Flush-Mount Compatible, premium dashboard integration for tournament rigs and sportfishers

Who This Fish Finder Is For

The ECHOMAP Ultra 2 166sv is best for tournament pros running tower consoles, offshore sportfishing captains, charter operations, and premium multi-display rigs. It's the right choice when 12" isn't large enough, but you don't want to step into GPSMAP 8000-series pricing. A 16-inch display is full tournament-rig territory. Six to eight split-screen views are simultaneously readable. Customers stepping up to 16" are typically running multi-display rigs where the 16" unit becomes the primary sonar and map hub, with smaller units on secondary consoles. Compared to 12" Ultra 2 units (122sv, 126sv), the 16" 166sv adds roughly $1,500 for the larger display, a meaningful step up if your console can accommodate it and your fishing style rewards multi-split sonar readability. Compared to the GPSMAP 8616Xsv (the next step up), the ECHOMAP Ultra 2 16" tier saves roughly $1,500-$2,000 while delivering most of the sonar and networking functionality offshore anglers actually use day-to-day.

Choose This If...

• Your console can accommodate 16.5" width, this is the most important fit constraint. Measure before buying.
• You run a multi-display rig, the 16" typically becomes the primary sonar/map hub while smaller units handle secondary roles. Full Marine Network makes this work seamlessly.
• You fish tournament circuits or run a charter, 6-8 split screens become genuinely readable at 16", which matters when you're running CHIRP + ClearVü + SideVü + LiveScope + map + side imaging simultaneously.
• You want the largest ECHOMAP available, above this is the GPSMAP 8000-series (premium marine chartplotter family), which is a different pricing and feature tier.
• Anglers who fish both inland reservoirs and coastal waters and want premium pre-loaded cartography, this variant ships with Navionics+ U.S. Inland + Coastal maps pre-loaded (keyed). For Worldwide Basemap without regional maps, pick the 162sv variant.
• Your budget is $4,500-$5,000 for the head unit, top of ECHOMAP line. If budget extends higher, evaluate GPSMAP 8612Xsv or 8616Xsv before committing.

Specifications

• Display: 16" Ultra-Bright IPS touchscreen, edge-to-edge glass, flagship ECHOMAP-tier brightness
• Head Unit Dimensions: 16.5" W x 11.2" H x 3" D
• Head Unit Weight: 12.3 lbs
• Power: 12V DC
• Connectors: 12-pin Garmin transducer port, NMEA 2000, Garmin Marine Network (Ethernet), dual microSD slots
• Transducer: GT56UHD-TM included with 20 ft cable. Many flagship buyers add a second thru-hull transducer for offshore use.
• Waterproof rating: IPX7
• SKU: 010-03386-01

Compatibility Reference

The ECHOMAP Ultra 2 166sv works with the full Garmin premium marine ecosystem:

• Transducers: GT20, GT22, GT52HW, GT54UHD, GT56UHD (flagship), Panoptix PS22/PS31, LVS32/LVS34 (via GLS 10), premium thru-hull and trolling motor transducers
• Live Sonar: LiveScope Plus, LiveScope XR, LiveScope Original (via GLS 10 black box)
• Trolling Motors: Garmin Force, Force Pro, Force Kraken, full integration including foot pedal control
• Marine Network: Full Garmin Marine Network, radar (GMR Fantom/xHD), cameras (GC cameras), autopilot (Reactor series), multi-display networking
• Networking: NMEA 2000 (engines, fuel, tanks, sensors), Wi-Fi, Garmin Marine Network (Ethernet)
• Cartography: Navionics+, Navionics Vision+ Premium, LakeMaster VX, CoastMaster Premium, C-MAP Genesis Edge, Quickdraw Contours
• Apps & Integration: ActiveCaptain, Garmin Quatix smartwatches, Reactor autopilots, Panoptix PerspectiveMode

Warranty

Covered by Garmin's 1-year limited warranty. At the flagship tier, Carolina Sportsman Outfitters strongly recommends professional installation for multi-display rigs, the networking, antenna routing, and transducer placement require experienced hands. We can help coordinate with qualified installers in the Carolinas. Call 252-431-6001 for pre-purchase configuration questions, installer referrals, or post-purchase setup guidance.

Frequently Asked Questions

What's the difference between ECHOMAP Ultra 2 16" and GPSMAP 8616Xsv?

The ECHOMAP Ultra 2 166sv is the top of the ECHOMAP line, designed primarily as a sonar/fishfinder with premium networking. The GPSMAP 8616Xsv is part of Garmin's dedicated premium marine chartplotter line, higher tier processor, more sophisticated radar/camera/autopilot integration, built for offshore sportfishing and larger vessels. The GPSMAP 8616 is roughly $1,500-$2,000 more expensive. For most serious anglers who fish inland and nearshore, the ECHOMAP Ultra 2 16" delivers the sonar and multi-display functionality you'll actually use. If you're running a 30+ ft offshore sportfisher with full radar, multi-camera, and autopilot integration, evaluate the 8616Xsv.

Is the ECHOMAP Ultra 2 166sv LiveScope compatible?

Yes, fully. Supports LiveScope Plus, LiveScope XR, and LiveScope Original via the Garmin GLS 10 black box (sold separately, around $499). At 16", LiveScope detail is exceptional, the display real estate combined with Ultra 2's premium processor shows detail most anglers haven't seen before.

Does it support Panoptix live sonar?

Yes. Panoptix PS22 and PS31 connect directly without requiring the GLS 10 black box, a feature of the Ultra 2 tier that UHD2 does not have. For anglers serious about Panoptix, this alone can justify the Ultra 2 tier.

Will 16 inches fit on my boat?

The head unit is 16.5" wide by 11.2" tall, that's a significant chunk of console real estate. Measure your available dashboard space before committing. Flush-mount installation is typical at this tier for dashboard integration. If your console can't accommodate 16.5", step down to the Ultra 2 12" tier (122sv or 126sv) which delivers the same Ultra 2 feature set at a smaller footprint.

Does the transducer come included?

Yes. Package includes GT56UHD-TM premium transom-mount transducer with 20 ft cable, Garmin's Ultra High-Definition flagship transducer. Many flagship buyers add a second thru-hull transducer for offshore or deeper-water use.

What maps are included?

This unit ships with Navionics+ U.S. Inland + Coastal maps pre-loaded (keyed). Preloaded coverage combines major U.S. inland reservoirs and rivers with coastal waters on both the Atlantic and Gulf, a flagship-tier feature that comes pre-installed. For Worldwide Basemap without regional maps, pick the 162sv variant. All units accept LakeMaster VX, CoastMaster Premium, and C-MAP Genesis Edge via microSD for expanded coverage.

Is professional installation required?

Not required, but strongly recommended for multi-display rigs. The 16" head unit is heavy (12.3 lbs), networking requires proper cable routing and termination, and multi-display rigs involve radar/camera/autopilot integration that's worth getting right the first time. Budget $500-$1,200 for professional flagship-tier installation depending on complexity. If you're running a single unit on a simpler boat, a capable DIY install is doable in 4-8 hours.

Is this used in tournaments?

Yes, at the top of all major circuits. B.A.S.S. Elite, MLF Pro Tour, FLW Tour, and all offshore tournament circuits. At 16", it's common to see this as the primary display on pro-level tournament rigs, with 9"-12" secondary displays. LiveScope use is subject to each tournament's specific live sonar rules.

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Carolina Sportsman Outfitters has been outfitting anglers with Garmin marine electronics since 2015. At the flagship ECHOMAP Ultra 2 tier, we help customers spec their complete rig, head unit, transducers, networking, LiveScope integration, and cartography, to make sure the pieces work together on tournament day. Call 252-431-6001 for pre-purchase configuration questions, installer referrals, or post-purchase setup help.