Sea-Dog 316 SS Adjustable Deck Mount Antenna Base | SED-329230-1
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You have 30 days to request a return. All sale items are final sale.
Sea-Dog 316 SS Adjustable Deck Mount Antenna Base
A premium, permanently mounted antenna base for VHF, AIS, GPS, and other standard marine antennas. Investment cast from 316 stainless steel, this adjustable deck mount features dual swivelling mounts and an integral cable feed system — letting you position your antenna at the ideal angle while routing the coax cleanly through the base with no exposed cable on deck.
The wide 2-1/2" footprint and robust 316 SS construction make this one of the most stable and corrosion-resistant fixed antenna bases available for deck or cabin top installation. At 4-1/2" tall, it provides meaningful elevation above the mounting surface without requiring a separate extension for most applications.
Key Features
- Investment cast 316 stainless steel – offshore-grade corrosion resistance
- Dual swivelling mounts – full directional antenna adjustment
- Integral cable feed system – coax routes through the base, no exposed cable
- Standard 1"-14 thread – fits most marine antennas
- Dimensions: 2-1/2" W x 2-15/16" L x 4-1/2" H
- Wide base footprint for maximum stability on deck
- MPN: 329230-1
Parts Desk Insights
Best Use Case: This base is the go-to choice for a permanent, high-quality VHF or AIS antenna installation on a deck or cabin top where you want adjustability, hidden coax routing, and offshore-grade materials in a single unit. The wider base footprint compared to narrower fixed bases gives it superior stability on planing hulls and in rough water. If you need a slightly more compact footprint with similar features, see the Sea-Dog Heavy Duty 316 SS Adjustable Deck Mount Antenna Mount. For rail or arch mounting without deck penetration, see the Sea-Dog 316 SS Tube Mount Antenna Base. To raise the antenna further above deck, pair with a Sea-Dog 316 SS Antenna Mount Extension – 12" or the Sea-Dog 316 SS Antenna Mount Extension – 24". On taller antenna runs, add a Sea-Dog Nylon Antenna Stand-Off Bracket to reduce flex at speed.
Installation Note: The 2-1/2" wide base requires adequate flat deck space and below-deck access for the integral cable feed. Confirm mounting surface dimensions before ordering.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.