Shakespeare Phase III 18 ft VHF Marine Antenna with Ratchet Mount (SHA-6018-R)
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Shakespeare Phase III 18 ft VHF Marine Antenna with Ratchet Mount (SHA-6018-R)
When range is non-negotiable, the Shakespeare Phase III 18 ft VHF antenna is the benchmark. Delivering 9 dBd gain from an 18-foot fibreglass radiator, this is the highest-gain antenna in the Phase III recreational and commercial crossover lineup — trusted by offshore sportfishers, large powerboats, and working vessels where every nautical mile of VHF range matters. The integrated ratchet mount allows the antenna to fold down for bridge clearance, covered slips, and trailering without removal.
Key Features
- 9 dBd gain — maximum VHF range for offshore and long-range coastal operations
- 18-foot (5.5 m) fibreglass construction delivers exceptional signal projection
- Integrated ratchet mount folds and locks at multiple angles — no tools required
- Covers the full VHF marine band (156–163 MHz)
- Standard 1–14 UNS thread base for compatibility with most marine antenna mounts
- UV-stabilised fibreglass radome for long-term structural and cosmetic integrity
- Shakespeare Phase III series — the professional’s choice for high-gain marine VHF
Understanding Gain
Each 3 dB increase in antenna gain roughly doubles effective radiated power in the horizontal plane. The 18 ft Phase III’s 9 dBd gain provides dramatically greater range than a standard 3 dBd (4 ft) antenna — critical for offshore fishing, commercial operations, and any application where early contact with coast guard or other vessels can make a real difference.
Ratchet Mount Advantage
At 18 feet, a fixed-mount antenna presents real challenges in marinas and under bridges. The -R ratchet mount allows the antenna to fold down in seconds and lock securely at multiple angles, protecting the antenna and eliminating the need to remove and stow it separately.
Specifications
- SKU: SHA-6018-R
- Brand: Shakespeare
- Series: Phase III
- Length: 18 ft (5.5 m)
- Gain: 9 dBd
- Frequency: 156–163 MHz (VHF Marine Band)
- Mount: Ratchet (foldable), 1–14 UNS thread
- Construction: Fibreglass radome
- Estimated Weight: 3.2 kg
Note: This item is currently out of stock. Inventory tracking is suspended until further notice. Contact us to inquire about availability or lead times.
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.