27MHz marine deck mount antenna, 27.88MHz, UHF male, 25W, 2.1dBi – 2.1m

Omnidirectional 27MHz marine deck mount antenna, 27.68-27.98 MHz, 25W, UHF male PL259, 4.5m cable, 2.1 dBi - 2.1m

Product code: ZM21-27

The ZM21-27 omnidirectional marine 27MHz deck mount antenna, is suitable for 27MHz communications whilst at sea. The ZM21-27 marine 27MHz antenna is tuned for maximum performance for the Distress, Urgency and Safety Calling 27.86 MHz and 27.88 MHz frequency allocations. The ZM21-27 marine HF antenna requires either a MM1 white nylon fold down base, MM2 stainless steel fold down base or alternatively you can mast mount the ZM21-27 HF marine antenna utilising a MMA mast mount adaptor with 2 x EB1-SS parallel mount clamps. ZCG recommend waterproofing your terminations utilising two layers of amalgamation butyl rubber and a single external layer of uPVC tape to ensure no water ingression into your connector joints. The ZM21-27 27MHz marine antenna should be orientated in a vertical polarisation whilst in use and completely laid flat whilst the vessel is being transported on a trailer to avoid contact with overhead infrastructure.



27.86-27.98 MHz - Maritime HF 27 MHz communications


Favoured for 27.68 MHz + 27.88 MHz - Maritime Distress, Urgency and Safety Calling


2.1 dBi


Factory at 1.5:1 VSWR at 27.86 MHz + 27.88 MHz


50 Ohms

H Plane beamwidth

360° omnidirectional

Maximum Power

25 Watts


Vertical, not tilted/leaning when in use, laid flat along vessel during trailered transit


White tapered fibreglass radome, chrome finished mount ferrule and 4.5m white RG58 cable, side exit from ferrule


UHF male PL259 connector - solder pin, twist-style supplied, not fitted


Height: 2.1m, Mount thread: 1-1/4" UNS female

Weight - kg


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