Here are the CHIRP transducers for use with the following compatible product lines: STRIKER™ fishfinder series, echoMAP™ CHIRP and GPSMAP® chartplotter/sonar combo series and GSD™ 25 digital sonar. Choose from various configurations of CHIRP traditional, CHIRP DownVü and CHIRP SideVü sonar technologies for any type of installation and fishing experience.

DownVü/SideVü Capability

 CHIRP
DownVü
CHIRP
SideVü
Frequency
(kHz)
Power
(W RMS)
Max.
Depth/Range1
Water
TempSensor
Max. Hull
Deadrise
GT8HW-TM
(8-pin)
Transom/trolling motor
N/AN/AN/AN/AN/AYesN/A
GT8HW-IF
(4-pin)
Ice fishing
N/AN/AN/AN/AN/ANoN/A
GT15M-IH
(8-pin)
In-hull
N/AN/AN/AN/AN/ANo25°
GT22HW-TM
(8-pin)
Transom/trolling motor
YesN/A455/800500500 feet downYesN/A
GT23M-TM
(8-pin)
Transom
YesN/A260/4555001,000 feet downYesN/A
GT23M-TH
(8-pin)
Thru-hull
YesN/A260/4555001,000 feet downYes25°
GT52HW-TM
(12-pin)
Transom/trolling motor
YesYes455/800500 each1,500 total500 feet down500 feet left & rightYesN/A
GT20-TM
(8-pin or 4-pin versions)
Transom/trolling motor
Yes2N/A455/800500750 feet downYesN/A

Traditional Sonar

 CHIRPFrequency
(kHz)
Power
(W RMS)
Max.
Depth1
Water
TempSensor
Max. Hull
Deadrise
GT8HW-TM
(8-pin)
Transom/trolling motor
YesHigh wide
CHIRP
150-240
250800 feetYesN/A
GT8HW-IF
(4-pin)
Ice fishing
YesHigh wide
CHIRP
150-240
250800 feetNoN/A
GT15M-IH
(8-pin)
In-hull
YesMid-band
CHIRP
85-165
6001,900 feetNo25°
GT22HW-TM
(8-pin)
Transom/trolling motor
YesHigh wide
CHIRP
150-240
250800 feetYesN/A
GT23M-TM
(8-pin)
Transom
YesMid-band
CHIRP
80-160
6001,800 feetYesN/A
GT23M-TH
(8-pin)
Thru-hull
YesMid-band
CHIRP
80-160
6001,800 feetYes25°
GT52HW-TM
(12-pin)
Transom/trolling motor
YesHigh wide
CHIRP
150-240
250800 feetYesN/A
GT20-TM
(8-pin or 4-pin versions)
Transom/trolling motor
Yes277/200 kHz5001,900feetYesN/A
Garmin GT8HW-TMGarmin GT8HW-TM 
 Plastic, Transom or Trolling Motor Mount Transducer, High Wide CHIRP (150-240 kHz, 250W) (8-pin)

This high wide CHIRP traditional transducer is perfect for the shallow-water fisherman who wants clear definition of the bottom under the boat as well as crisp, clear and wide fish arches with excellent target separation. The wider beam width (up to 24 degree beam angle) also provides a larger coverage area in the water.
Weight: 0.63 lb (0.29 kg)
Cable length: 20 ft
Dimensions:
  Transducer: 3.5 x 1.8 x 2.2 in (88 x 45 x 56 mm)
Max Depth: 
  Traditional: 800 ft
Beam Width (°) LF/HF (-3dB):
  Traditional: 24/16
Read water temperature: Yes
Garmin GT8HW-IF Garmin GT8HW-IF 
 Ice Fishing, Plastic, High Wide CHIRP Transducer (150-240 kHz, 250W) (4-pin)
This high wide CHIRP traditional transducer is perfect for the ice fisherman who wants clear definition and separation between their bait, fish and the bottom. It features a user selectable beam width from 16 to 24 degrees. The Narrow beam width provides better target separation with less clutter and the wider beam width offers the most coverage area. The transducer cable has a silicone jacketed cable that remains flexible in cold weather conditions. This transducer is perfect for use with a Garmin portable kit.
Weight: 0.59 lb (0.27 kg)
Cable length: 8 ft
Dimensions:
  Transducer: Ø 1.8 x 3.3 in (45 x 83 mm)
Max Depth: 
  Traditional: 800 ft
Beam Width (°) LF/HF (-3dB):
  Traditional: 24/16
Read water temperature: No
Garmin GT15M-IHGarmin GT15M-IH 
 Plastic, In-Hull, Mid-Band CHIRP Transducer (85-165 kHz, 600W) (8-pin)

This mid-band CHIRP traditional transducer is ideal for the fisherman who wants to install the transducer inside the hull, not on the transom where cavitation could cause issues. It can be used with a hull deadrise angle between 0 and 25 degrees. It is excellent for boats traveling at high speeds that want to maintain accurate depth readings.
Weight: 1.00 lb (0.45 kg)
Cable length: 20 ft
Dimensions:
 Transducer: Ø 3.7 x 2.0 in (93 x 51.5 mm)
 Installed in largest tank: Ø94 x 86.5 mm
Max Depth: 
  Traditional: 1,900 ft
Beam Width (°) LF/HF (-3dB):
  Traditional: 24/13
Read water temperature: No
Garmin GT22HW-TMGarmin GT22HW-TM 
 Plastic, Transom or Trolling Motor Mount Transducer, High Wide CHIRP (150-240 kHz, 250 W)/CHIRP DownVü (455/800 kHz, 500 W) (8-pin)
This high wide CHIRP traditional and CHIRP DownVü transducer is perfect for the freshwater fisherman who wants excellent CHIRP traditional sonar and scanning sonar with CHIRP DownVü. This transducer consistently displays clear and crisp fish arches with superior target separation as well as clear definition of structure below the boat.
.
Weight: 0.94 lb (0.43 kg)
Cable length: 20 ft
Dimensions:
 Transducer: 6.1 x 2.0 x 1.0 in (155 x 52 x 26 mm)
Max Depth: 
  Traditional: 800 ft
  DownVü: 500 ft
Beam Width (°) LF/HF (-3dB):
  Traditional: 24/16
      DownVü:
                    2.0×50@455
                    1.0×30@800
Read water temperature: Yes
Garmin GT23M-TMGarmin GT23M-TM 
 Plastic, Transom Mount Transducer, Mid-Band CHIRP (80-160 kHz, 600 W)/CHIRP DownVü (260/455 kHz, 500 W) (8-pin)

This mid-band CHIRP traditional and CHIRP DownVü transducer is perfect for the coastal and offshore fisherman who wants excellent CHIRP traditional sonar and scanning sonar with CHIRP DownVü. This transom mount transducer consistently displays clear and crisp fish arches with superior target separation as well as clear definition of structure below the boat.
Weight: 1.87 lb (0.85 kg)
Cable length: 30 ft
Dimensions:
 Transducer: 9.0 x 2.4 x 1.2 in (228 x 62 x 30 mm)
Max Depth: 
  Traditional: 600 W
      DownVü: 500 W
Beam Width (°) LF/HF (-3dB):
  Traditional: 24/13
      DownVü:
                     2.0×51@260
                     1.4×29@455
Read water temperature: Yes
Garmin GT23M-THGarmin GT23M-TH
 Stainless Steel, Thru-Hull Mount Transducer, Mid-Band CHIRP (80-160 kHz, 600 W)/CHIRP DownVü (260/455 kHz, 500 W) (8-pin)
This mid-band CHIRP traditional and CHIRP DownVü transducer is perfect for the coastal and offshore fisherman who wants excellent CHIRP traditional sonar and scanning sonar with CHIRP DownVü. This thru-hull mount transducer consistently displays clear and crisp fish arches with superior target separation as well as clear definition of structure below the boat.

Weight: 4.82 lb (2.19 kg)
Cable length: 30 ft
Dimensions:
 Transducer: 9.0 x 2.4 x 1.6 in (228 x 62 x 41 mm)
 Transducer Stem: Ø 1.0 x 5.3 in (24 x 135 mm)
 Fairing block: 12.7 x 4.6 x 2.5 in (323 x 116 x 64 mm)
Max Depth: 
  Traditional: 600 W
      DownVü: 500 W
Beam Width (°) LF/HF (-3dB):
  Traditional: 24/13
      DownVü:
                     2.0×51@260
                     1.4×29@455
Read water temperature: Yes
Garmin GT52HW-TMGarmin GT52HW-TM
Plastic, Transom or Trolling Motor Mount Transducer , High Wide CHIRP (150-240 kHz, 250 W)/CHIRP DownVü and CHIRP SideVü (455/800 kHz, 500 W, 12-pin)

This high wide CHIRP traditional, CHIRP DownVü and CHIRP SideVü transducer is perfect for the freshwater fisherman who wants excellent CHIRP traditional sonar and scanning sonar with CHIRP DownVü and CHIRP SideVü. This transducer consistently displays clear and crisp fish arches with superior target separation as well as clear definition of structure below and to each side of the boat. This transducer is ideal for mounting to a trolling motor due to its compact size.
Weight: 1.35 lb (0.61 kg)
Cable length: 20 ft
Dimensions:
 Transducer: 6.1 x 2.0 x 1.0 in (155 x 52 x 26 mm)
Max Depth: 
  Traditional: 800 ft
      DownVü: 500 ft
        SideVü: 500 ft
Beam Width (°) LF/HF (-3dB):
      Traditional: 24-16
          DownVü:
                    2.0×50@455
                    1.0×30@800
          SideVü:
                    2.0×50@455
                    1.0×30@800
Read water temperature: Yes

1 Depth capacity is dependent on water bottom type and other water conditions.
2 When used with an echoMAP™ CHIRP chartplotter/sonar combo device.