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The EM305PE is a popular high response radar reflector with a robust Polyethylene case and is suitable for large 15 - 20 metres size vessels.

Following a year of sea trials the US Navy SubPac Division Hawaii chose the original EM305 glass fibre cased unit for enhanced visibility upon surfacing for their fleet of Nuclear Submarines. Following their sea trials we introduced the new Polyethylene case with peak performance of 62.9m² with an average at +1-3° of 10m² which was 21.6% more effective than the glass fibre model. Also used on Trinity House Buoys, Ostend Harbour Entrance and recently the River Rhone.

Successfully tested by QinetiQ to ISO 8729-1999 and meets RORC,ORC,ISAF 2012/13 and WCC requirements of 10M2.

  • NATO stock number 5840 99 812 8790

  • Maximum RCS 62m2 | Average RCS+/- 3 deg 10M2

  • Diameter 338mm

  • Height 720mm

  • Fixings 8mm

  • Weight 5kg


305 Linear diagram sn 5220.JPG

On behalf of the French Navy tests have been carried out by QinetiQ for response to the Nato frequencies 8 - 18 Ghz     (I and J band) see below.

Line drawing of 305.JPG
Line drawing of the top.JPG
Line drawing of the base.JPG

Echomax may be fitted in any position around the mast (i.e fore or aft).

Hypothetical figures on mast shadow may be viewed                .

Utilising Echomax stainless steel mast brackets (available separately) fit reflector as high as possible on the mast, using Monel or stainless steel rivets (3/16 x 1/2" 4.8 x 12.7mm). To avoid electrolytic action use zinc chromate paste between bracket and mast or closed cell foam tape. Firstly fix top bracket to mast in the required position, measure distance vertically between centres, mark position of lower bracket then drill and fix. Use two stainless steel hexagonal bolts 8mm dia x 30mm long to fix Echomax to the mounting brackets

EM305 Windfarm yellow.jpg
EM305 deck bracket.JPG
EM305 mast brackets.JPG

A deck bracket is also available separately


The EM305 and EM400 being used as missile targets by the US Navy

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