PERFORMANCE: Engineered with internal brass and copper elements to maximize range and efficiency while maintaining a low-angle radiation pattern.

Key Features

• ✔ Durable white gloss fibreglass finish
• ✔ High-grade Stainless Steel ferrule
• ✔ Internal brass & copper elements
• ✔ Includes 6m (20ft) RG-58 cable
• ✔ PL-259 connector included (not installed)

Technical Specs

Frequency:	156 - 162 MHz
Gain:	3dB
Max Power:	50 Watts
SWR:	1.5:1 at 156.8 MHz
Impedance:	50 Ohms
Length:	1.5m (5ft)

Make/System	Model/Application	Notes
Marine VHF	Universal Fixed Mount Radios	Requires PL-259 connection
Mounting Hardware	1" x 14 TPI Standard Thread	Compatible with 4187 or 5187 mounts
Vessel Type	Power, Fishing & Work Boats	Best for small-medium vessels

Is this a genuine original part?

Yes, this is a genuine Shakespeare Marine product, ensuring the highest quality in maritime radio communication.

How do I know if it is compatible?

This antenna uses the global standard 1" x 14 TPI thread. If your boat has a standard ratchet mount or rail mount, this will thread directly onto it.

What is the difference between the 427-S and 427-N?

The 427-S (this model) features a 316-grade Stainless Steel ferrule, whereas the 427-N uses a Nylon ferrule. The S-version is recommended for better durability in high-vibration or extreme saltwater environments.