The AV400 Heavy Duty Commercial GRP Antenna is an omni-directional antenna, specifically designed so that the user can dedicate one antenna for the narrowband frequency specified for AIS (Automatic Identification System). Using a dedicated antenna helps to eliminate interference from nearby VHF channels.

FEATURE

Omnidirectional
Designed for AIS
Rugged GRP Tube
Closed cell foam and epoxy resin sealed
Supplied complete with 2 mast clamps
Watertight

APPLICATIONS

Installation on board commercial vessels
Shoreside monitoring stations where a rugged AIS antenna is critical

Technical Specification

Specification	Details
Part Number / SKU	AV400
Model	Comar AV400 Heavy Duty Commercial GRP Antenna
Primary Application	Commercial Marine AIS Transponders, VTS Stations, and Primary VHF Communications
Operating Frequency Range	156 MHz to 163 MHz (Marine VHF & AIS Band)
Antenna Type	Collinear Half-Wave Dipole
Gain	3 dBi to 4.5 dBi (Commercial Grade Performance)
Impedance	50 Ohm
VSWR	< 1.5:1 across operating band
Polarization	Vertical
RF Connector	SO239 Female (PL259 Compatible) / N-Type (model dependent)
Mounting Interface	Standard 1″ x 14 TPI threaded base (compatible with heavy-duty commercial mounts)
Radome Material	Heavy-Duty UV-Resistant GRP (Glass-Reinforced Plastic)
Country of Origin	United Kingdom (UK)
Operating Temperature	-40°C to +80°C (-40°F to 176°F)
Waterproof Rating	IP67 (Heavy Weather Exterior / Masthead Installation)
Dimensions & Weight	Length: approx. 1.2 m to 1.5 m (4 ft to 5 ft); Weight: ~850 g