GT21-TM – Sonde TA ClearVü CHIRP 500W (260/455kHz) et traditionnel 600W (50/200kHz) + capteur de température (8-pin) - Garmin image 1

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010-01962-00

GT21-TM – Hljóðmerki fyrir afturborð með TA ClearVü CHIRP 500W (260/455kHz) og hefðbundin 600W (50/200kHz) + hitamælir (8-pin)

Conçue pour la pêche côtière et hauturière, la sonde Garmin GT21-TM est un transducteur de tableau arrière à 8 broches, offrant un sonar traditionnel 600W (50/200kHz) et un sonar à balayage ClearVü CHIRP 500W (260/455kHz), avec capteur de température intégré. Elle assure une détection précise des poissons et une visualisation détaillée des structures sous-marines. Le produit inclut la sonde, le support de fixation sur tableau arrière et la documentation d'installation.

Retail priceGet pro pricing

166,00€

166,00€ ~~209,00€~~

með skatti Sendingar reiknaðar við greiðslu.

Á lager

Free pickup point for orders over €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

through our network of certified installers

Find an installer

Service & Support

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Technical specifications

Tæknar í botnvörpum sem styðjast við	Sonar traditionnel,CHIRP ClearVü
Tíðni sonar	50/200 kHz (Traditionnel), 260/455 kHz (ClearVü CHIRP)
Hámarks afl	600.0
Hámarksdýptarkvarði	457.0
Efni mælisnefils	Plastique
Tegund tenginga fyrir sonar	8 broches
Lengd rafleiðara	9.1
Innbyggður hitaskynjari	Oui
Samhæfir skjáar	Traceurs de cartes et sondeurs Garmin compatibles 8 broches
Samhæfni við gagnabraut	Propriétaire Garmin
Fasttengt net	Propriétaire Garmin
Gerð festingar	Tableau arrière
Geislasvæði	Traditionnel: 40°/10°, ClearVü: 2.0°x51° (260 kHz), 1.4°x29° (455 kHz)
CHIRP tíðni (hár)	445-465
CHIRP tíðni (lág)	245-275
Clearvu Sonar Power Output	500
Gerð veiðar	Mer, Lac, Rivière
Hull Material Compatibility	Tous types
Hull Type Not Recommended	Voiliers, Coques à redans
Innbyggður hraðaskynjari	Non
Max Operating Speed Sonar Kph	54.7
Min Propeller Clearance	38
Mounting Method Details	Fixation au tableau arrière avec support et vis
Útgáfuár	2015.0
Traditional Sonar Horizontal Beam Width	40
Transom Angle Range	0° à 70°
Vulnerability Description	Dommages externes par remorques ou obstructions sous-marines
Water Contact Requirement	Constant

Detailed description

Hönnuð fyrir strand- og úthafsfiskveiðar er Garmin GT21-TM hljóðmerki fyrir afturborð með 8 stiftum sem sameinar hefðbundin sonar og sonar með CHIRP ClearVü skönnun. Það gefur út myndir af neðansjávarbyggingum og nákvæmar boga af fisk með betri aðgreiningu milli marka.

Ítarefni Sonar

Hefðbundni sonarinn í GT21-TM starfar á 50/200 kHz með 600 W afl, sem gerir það kleift að ná 457 m (1.500 fet) dýpi. Breidd geisla er 40°/10°. Samhliða því býður CHIRP ClearVü sonarinn 500 W afl á 260/455 kHz (CHIRP bilin: 245-275 kHz og 445-465 kHz) með geisla 2,0°x51° við 260 kHz og 1,4°x29° við 455 kHz, fyrir 305 m (1.000 fet) dýpi. Þessi samsetning veitir fjölbreytta skynjun fyrir mismunandi fiskveiðuaðstæður og greinir sig frá ein tíðni eða einni tækni hljóðmerkjum.

Samþætting og Frammistaða

Með innbyggðum hitamæli með fljótri svörun og 9,1 m (30 fet) kabeli er GT21-TM hljóðmerkið hannað fyrir uppsetningu á afturborði og styður við borðhorn frá 0° til 70°. A.m.k. viðlíkt öðrum afturborðshljóðmerkjum (t.d. Garmin GT-TH eða LVS-TH) er einfaldari uppsetning en það er samhæft flestum skrokksefnum. Bestu niðurstöður fást við hraða undir 34 mílur klukkustundar og skal setja það í fjarlægð frá hvirfilstraumum sem skapast við skrúfuna til að tryggja stöðuga merkiöflun.

Documentation

Type	Nom
	Installation Manual - Transducer Placement Guide (EN)
	Installation instructions - Garmin GT21-TM transom-mount transducer installation (EN)

Expert review

Pol CONIN

Stjórnandi stafrænna hluta

« Technical analysis of the Garmin GT21-TM transducer: Dual Sonar capability and TA installation »

The Garmin GT21-TM transducer is a relevant solution for recreational boats and sport fishing vessels requiring detailed underwater mapping without the constraints of a through-hull installation. Its transom-mount positioning makes it particularly suitable for trailerable boats or users seeking quick and reversible deployment. Although it is more exposed to external damage than internal transducers, its mounting allows fine adjustment of tilt to optimize the sonar beam—a crucial advantage for compensating for variations in boat load or sea conditions.

For optimal performance, it is imperative to follow placement recommendations, particularly keeping clear of the propeller and turbulence zones (prop wash), while considering the propeller's rotation direction. Correct installation ensures signal stability at moderate speeds. This model, with its dual capability of traditional sonar and ClearVü, offers appreciable versatility for fish tracking in the water column and identifying structures. It stands out for this versatility compared to purely traditional transducers, providing better understanding of the underwater environment without the investment in more advanced technologies like SideVü or LiveScope, which often require compatible displays and higher budgets. It is important to note that for hulls with high deadrise angles or for use at very high speeds (>34 mph), a through-hull transducer may offer better signal stability.

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GT21-TM – Hljóðmerki fyrir afturborð með TA ClearVü CHIRP 500W (260/455kHz) og hefðbundin 600W (50/200kHz) + hitamælir (8-pin)

166,00€

166,00€ ~~209,00€~~

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Frequently asked questions

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What type of transducer is the Garmin GT21-TM?

The Garmin GT21-TM is a transom-mount fishfinder designed to be installed externally at the stern of the boat. It combines traditional sonar and CHIRP ClearVü scanning sonar technologies.

Which sonar technologies does the GT21-TM transducer use?

The GT21-TM transducer uses two main sonar technologies:

Traditional sonar, which provides clear fish arches and excellent target separation.The CHIRP ClearVü scanning sonar, which delivers near-photographic images of underwater structures and fish beneath your boat.

What are the frequencies and power output of the traditional sonar on the GT21-TM?

The GT21-TM transducer’s traditional sonar operates on 50/200 kHz frequencies with 600 W power output.

What are the frequencies and power output of the ClearVü CHIRP sonar in the GT21-TM?

The CHIRP ClearVü sonar of the GT21-TM transducer operates on frequencies of 260/455 kHz (CHIRP ranges: 245-275 kHz and 445-465 kHz) with a power output of 500 W.

What is the maximum depth the GT21-TM transducer can reach?

The GT21-TM transducer can reach a maximum depth of 457 meters (1,500 feet) using traditional sonar (50/200 kHz) and 305 meters (1,000 feet) with CHIRP ClearVü sonar (260/455 kHz).

Does the GT21-TM transducer include a temperature sensor?

Yes, the Garmin GT21-TM transducer is equipped with an integrated fast-response temperature sensor.

What is the length of the cable and the type of connector for the GT21-TM depth sounder?

The GT21-TM transducer comes with a 9.1-meter (30-foot) cable and features an 8-pin connector.

What are the beam angles for the traditional sonar and ClearVü of the GT21-TM?

The beam angles of the GT21-TM transducer are:

For traditional sonar: 40°/10°. For CHIRP ClearVü sonar: 2.0°x51° at 260 kHz and 1.4°x29° at 455 kHz.

How should the Garmin GT21-TM transducer be mounted on the boat?

The GT21-TM transducer is a transom-mounted transducer. It must be mounted on the transom of the boat using a bracket and screws. Installation requires drilling holes in the transom for the bracket and potentially for cable routing. It is critical to mount it so that it is in direct contact with smooth, undisturbed water, away from turbulence.

What tools are required for installing the GT21-TM transducer?

To install the GT21-TM transducer, you will need the following tools:

A drill and drill bits.
Two 13 mm hex wrenches.
A #2 Phillips screwdriver.
Masking tape.
Marine sealant.

Where should I install the depth sounder on the transom for optimal performance?

For optimal performance, the transducer must be mounted:

As close as possible to the center of the boat.
Away from propellers, strakes, reinforcements, water intakes or discharges, and anything that could create air bubbles or turbulence.
In an area where it is not at risk of damage during launching, towing, or storage.
Parallel to the boat's waterline.

How to avoid interference with the depth sounder signal?

To minimize interference:

Mount the transducer away from electromagnetic (electronic devices, engines, radar) and acoustic (other transducers, boat machinery, wind, waves) interference sources.Avoid turbulence zones caused by hull features or propeller wash.If the transducer cable must cross a power cable, orient the cables at 90 degrees.If using multiple transducers, mount them at least 60 cm (24 inches) apart and avoid operating two transducers of the same frequency simultaneously.

What is the diameter of the hole to drill for passing the fishfinder cable through the transom?

For the 8-pin cable of the GT21-TM transducer, you will need to drill a 25 mm (1 inch) diameter through-hole in the transom.

Should marine sealant be used when installing the depth sounder?

Yes, it is imperative to apply marine sealant around all screws and around the cable where it passes through the transom to ensure watertightness and prevent any water ingress into the boat.

Can I install the GT21-TM transducer near the propeller?

No, it is strongly recommended to install the transducer far from the propeller. The propeller wash creates turbulence that can interfere with the fishfinder’s signal and damage both the transducer and the propeller. Install it at least 38 cm (15 inches) from the propeller and on the side opposite to the propeller’s rotation direction.

How to test the GT21-TM transducer installation?

To test the installation:

Put the boat in the water and power on the chartplotter.Drive the boat at low speed and check the fishfinder is working correctly.Increase speed gradually while monitoring the chartplotter.Note the speed at which the signal is lost or degraded.If the signal is lost, return to the speed where the loss occurred and make moderate turns in both directions.If the signal improves while turning, adjust the transducer 3 mm (1/8 in) lower.Repeat steps until degradation is eliminated. If the signal does not improve, consider relocating the transducer.

Is the GT21-TM transducer compatible with all hull types?

Yes, as a transom-mount transducer, the GT21-TM is compatible with all hull materials.

Can this transducer be used on a deep-V hull or a sailboat?

The GT21-TM transducer is not recommended for use on sailboats due to excessive heel. For deep-V hulls, mount the transducer at the lowest point before the first chine and away from other hull features that create turbulence.