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Shakespeare MD23-AIS Unity Gain Heavy Duty AIS Antenna 0.3m Marine Low Profile

Shakespeare MD23-AIS Unity Gain Heavy Duty AIS Antenna 0.3m Marine Low Profile

£153.46 GBP
£153.46 GBP
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Shakespeare MD23-AIS Antenna

Heavy Duty Unity Gain Low-Profile AIS Antenna (0.3m)

The Shakespeare MD23-AIS (V-Tronix series) is a high-performance, low-profile helical antenna specifically engineered for the Automatic Identification System (AIS). Measuring just 0.3m (approx. 1ft) in height, this "Squatty Body" style antenna is designed to withstand the most rugged marine environments while maintaining excellent signal reception for AIS transponders and receivers.

RELIABILITY: Featuring an over-moulded helical design with all electrical parts sealed in epoxy resin to prevent water ingress and corrosion.

Key Features

  • ✔ Specifically pre-tuned for AIS frequencies
  • ✔ Low windage and unobtrusive low-profile
  • ✔ Epoxy-sealed for extreme weather resistance
  • ✔ Includes 20m RG-58 cable and bracket
  • ✔ No ground plane required

Technical Specs

Frequency: 161.975 - 162.025 MHz
Gain: Unity (0 dB)
Length: 0.3m (1ft)
VSWR: < 1.5:1 at Resonance
Impedance: 50 Ohms
Cable Supplied: 20m RG-58
Connector: PL-259 (Fitted)

Compatibility / Fitment Guide

Make/System Model/Application Notes
AIS Transponders All Class A & B Transponders Raymarine, Garmin, Simrad, Icom, etc.
AIS Receivers Standard Marine AIS Receivers Ideal for dedicated AIS reception
Vessel Types Sailboats, RIBs, Tenders, Powerboats Best where height is restricted

OEM Cross Reference

Shakespeare MD23-AIS
V-Tronix MD23-AIS
4Boats SKU 818-MD23-AIS

Questions & Answers

Is this a genuine original part?

Yes, this is a genuine Shakespeare/V-Tronix product, supplied in original retail packaging with all included accessories.

How do I know if it is compatible?

This antenna is compatible with any AIS transponder or receiver that requires a 50-ohm antenna input. It is specifically tuned for the AIS frequency band (162MHz).

Can this be used for standard VHF voice radio?

No. This antenna is pre-tuned specifically for AIS frequencies (161.975MHz to 162.025MHz). Using it for standard Marine VHF (156MHz) may result in high SWR and poor performance.

Note: Please verify your technical requirements against the specifications above before purchasing. Distributed by 4boats.co.uk.

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