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- USA
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Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
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Description
Digital Antenna 578-SB 4' AIS AntennaAIS Antennas 4' Length, 4. 5dB Gain In conjunction with the USCG Automatic Identification System (AIS) requirements for commercial vessels, Digital Antenna created a series of 4 AIS antennas that meet the exacting AIS frequency requirements. Designed with a low 1. 5: 1. 0 SWR ratio from 159 162 MHz, Digital Antennas 4. 5 dB gain AIS antennas offer unsurpassed durability and performance compatible with all AIS transponders. Customers and installers
AIS Antennas4' Length, 4.5dB Gain
In conjunction with the USCG Automatic Identification System (AIS) requirements for commercial vessels, Digital Antenna created a series of 4 AIS antennas that meet the exacting AIS frequency requirements. Designed with a low 1.5:1.0 SWR ratio from 159-162 MHz, Digital Antennas 4.5 dB gain AIS antennas offer unsurpassed durability and performance compatible with all AIS transponders.
Customers and installers love the 500 GOLD Series easy installation connector system. The gold factory-attached mini-UHF female connector with PL-259 (UHF) adapter makes connecting to the AIS transponder easy, eliminating the need to solder connectors.
All of our antennas are made in the USA, assembled, tested and tuned by hand for maximum performance, quality and durability.
All 4' AIS Antennas Feature:
- Powerful brass radiators
- Soldered connections
- Power directing ferrite choke bead
- High gloss urethane finish
- 316 stainless steel ferrule
- 4.5dB gain
500 GOLD Series
- Mount: Standard 114 threaded base
- Connector: Gold factory-attached mini-UHF female with mini-UHF male to UHF male (PL259) adapter
- Cable: Includes 25 of our low-loss, tinned braid, foil shielded, UV stable RG-8X marine cable
This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.
Manufacturer Part Numbers: 578-SB
Quick Guide (PDF)
Installation Guide (PDF)
GRP:WRO
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 536 reviews
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Product Reviews
★★★★★ 5
Good treats
Dogs love these! We have Chihuahuas and have to cut these in half for them as a while one is too large.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Healthy, Slightly Soft/Chewy Treat!
VERY pleased to have found these! Wanted something to offer Mookie as a "special treat" (a step up from Milkbones, but NOT long-lasting) that was healthy and easily digestible. He wasn't sure what to make of them at first... they're fairly soft and a little chewy, and they just smell like FRESH sweet potatoes -- not any fake meat or seasoning.
Once he started chewing, however, he got very excited about the new treat, and now when he hears the bag being handled/opened, he comes running and does his little happy dance! We'll be keeping these on hand because the quality and reasonable price - combined with the LACK of tummy distress and his enjoyment - make this a "go-to" special reward.
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Reviewed in the United States on January 4, 2026
★★★★★ 5
A Nutritional Treat!
My German Shepherd loves this so much, I sometimes use it as a training treat! Sweet Potato is beneficial to dogs. The only complaint I have is the size consistency from bag to bag.
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Reviewed in the United States on May 8, 2026
★★★★★ 4
They used to be soft and moist but not now
These used to be one of my dogs’ favorite sweet potato treats, but they’ve gotten too hard and thick to cut for their morning snack or cut for their puzzle pieces. Because they’re not only too hard to cut, they’re also too hard for them to eat. Both, my Maltese and Shih Tzu love sweet potato treats, but they leave the dry ones behind. Since something made the Shih Tzu so sick that I had to spend a small fortune at the vet trying to make her better, she avoids all dry treats now and unfortunately that includes a lot of necessary nutrients. I hope these go back to being soft and moist the way they used to be!
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Reviewed in the United States on March 25, 2026
★★★★★ 5
A favorite healthy treat for my 6 pups!
My six dogs absolutely love these treats! I just ordered my third bag.I love knowing they are healthy and good for dogs with sensitive stomachs. The smell is great and reminds me a little bit of Thanksgiving. Each bag has several different sized treats so I can give my bigger dogs a bigger one and smaller dogs a smaller piece. They are wavy like a ruffle potato chip, but chewy, which is great because that means it takes my pups a minute or two to eat. They are a great price because my local grocery store sells the same type of treat in a smaller size bag at a higher price than these.
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Reviewed in the United States on February 12, 2026