Description
GSD™ 28 Advanced Sonar Module
See what’s down there. Catch what’s down there. Take sport fishing to extreme depths with a high-powered sonar module with the features that are needed to improve the chances of success.
Features:
- Engineered for offshore sport fishing
- See sonar faster with Garmin RapidReturn™ technology
- Crisp and clear fish targets with Xchirp technology
- Excellent target separation with xCHIRP technology
- Greatly reduce wave and swell from bottom returns with heave compensation
Garmin RapidReturn Sonar
This high-performance technology provides Garmin's fastest deep-water scrolling sonar with 2 to 6 times the ping rate of Garmin's GSD™ 26 sonar. This allows captains to make fast and informed decisions based on what is below their boats.
xCHIRP Technology
Easily distinguish bait from sport fish with Garmin's clearest traditional sonar fish arches and excellent target separation. Get smooth bottom returns and precise targeting at extreme depths.
Heave Compensation
When the seas get rough, use the MSC™ 10 external satellite compass (sold separately) to greatly reduce wave and swell from the sonar returns.
Compatibility
Transducer Support
This sonar module is compatible with a wide range of Garmin and AIRMAR® transducers (sold separately).
Retrofitting
The GSD 28 module is ideal for retrofitting boats with existing bare wire transducers.
Performance
Sonar Power
GSD 28 can output 300 watts to 3 kW at extreme depths
CHIRP Support
The module supports dual-channel CHIRP (up to 3 kW per channel).
Operation Range
The GSD 28 sonar module can operate in the 25 to 250 kHz frequency range.
Built to Last
GSD 28 is rated for harsh marine environments and water resistance with an IPX7 rating.
In the Box:
- GSD 28
- Power cable
- Garmin BlueNet™ marine network cable (6 ft) with legacy network adapter
- Field-installable adapter kit for the Garmin BlueNet network
- Mounting hardware
- Documentation
Specifications
General:
- Case Material: Fully gasketed, aluminum housing, steel back panel, plastic access panel
- Physical Dimensions: 10.7" × 14.4" × 4.0" (27.06 cm × 36.66 cm × 10.1 cm)
- Weight: 14.13 lbs (6.4 kg)
- Water Rating: IPX7
- Temperature Range: 5° F to 158° F (from -15° C to 70° C)
Electrical Features:
- Power Input: 10-32 V
- Power Usage: 120 W maximum
- Fuse: 15A
Sonar Features:
- Frequencies Supported: Dual channel CHIRP: 25-250 kHz (transducer dependent)
- Transmit Power: 300W–3kW RMS (transducer dependent)
- Maximum Depth: 10,000 ft. (3,048 m)
- xCHIRP: Yes
- Rapid Return: Yes
Connections:
- Garmin Marine Network Ports: (Garmin BlueNet)
- Sonar Connections: 2 bare wire
WARNING: This product can expose you to chemicals including NICKEL (METALLIC) which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov.
Estimate shipping
Refund Policy
Easy Returns
We've taken out the hassle of returning an item so you can shop with confidence. If you need to return an item, we'll provide you with a pre-paid UPS return label that you can print at home. The cost for using the label will be calculated and deducted from your refund.
To start a return, please contact us at sales@theyachtrigger.com Items sent back to us without first requesting a return will not be accepted.
30-Day Return Policy
We have a 30-day return policy, meaning you have 30 days after receiving your item to request a return or exchange.
Eligibility for Returns
To be eligible for a return, your item must be in the same condition that you received it—unworn or unused, including tags, instruction manuals, warranty cards, and in its original packaging. You’ll also need the receipt or proof of purchase.
We reserve the right to refuse returns or assess additional fees at our discretion if:
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The merchandise is missing parts
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The item is not in new condition
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The return is beyond the accepted return dates
Return Shipping & Restocking Fees
Customers are responsible for return shipping.
If you request The Yacht Rigger to provide a shipping tag, the shipping cost will be deducted from your refund. No international return shipping labels will be provided.
A 3% restocking fee will apply.
No returns on final sale items.
Damages and Warranties
Please inspect your order upon receipt and contact us immediately if the item is defective, damaged, or if you received the wrong item.
Most items we sell are covered by manufacturers' warranties. If you experience difficulty with a product, please contact the appropriate manufacturer for assistance and troubleshooting help, or email us at sales@theyachtrigger.com . If your order was received via freight truck, you must notify us within 5 days.
Exceptions / Non-Returnable Items
Certain types of items cannot be returned, such as custom products and special orders. This includes cut line, wire, rope, and similar items that are customized to length. We also do not accept returns for hazardous materials, flammable liquids, or gases. Unfortunately, we cannot accept returns on sale items or gift cards.
Exchanges
The fastest way to ensure you get what you want is to request a return of the item you have. Once the return is accepted, you can make a separate purchase for the new item to ensure it is in stock.
European Union 14-Day Cooling Off Period
If the merchandise is being shipped to the European Union, you have the right to cancel or return your order within 14 days, for any reason and without justification. As above, your item must be in the same condition that you received it—unworn or unused, with tags, instruction manuals, warranty cards, and in its original packaging. You’ll also need the receipt or proof of purchase.
Refunds
We will notify you once we’ve received and inspected your return and inform you if the refund was approved. When processing a refund, no additional transaction fee is incurred; however, the original credit card transaction fee is not refunded.
If approved, you’ll automatically be refunded to your original payment method within 10 business days. Please allow some time for your bank or credit card company to process and post the refund. If more than 15 business days have passed since we’ve approved your return, please contact us at sales@theyachtrigger.com
Return Policy Abuse
We reserve the right to refuse service to anyone suspected of abusing any policy of The Yacht Rigger.






