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Radar Reflectors - Commercial

EM230BM, EM325, EM305PE Available in Red, Green and Yellow 

Echomax EM230 EM305 EM325

EM230BM Mk11 and

EM325 3 stack

 EM230Midi Basemount MKII Chosen by the RNLI for their ribs this model recorded 100%. paints at 3.8miles and 80% paints at 5 miles plus in sea state “fair” when mounted only 2m above sea level. Qinetiq anechoic response recorded
  • +/-3  20m peak, 75%@2.5m, 100% @1.25m
  • Base Diameter 150mm
  • Fixing Centres: 4x6mm bolts at 80mm centres

Available with optional navigation light

  • Height 432mm
  • Width 245mm
  • Weight 2.3kg


EM325 2 and 3 stack

EM325 Available in two sizes and perfect for use with heavier navigation lights such as the Sealite Sl15 and Carmanah M650.  The EM325 has base fixings at 200mm PCD and optional top fixings to suit the navigation light of your choice.

The 2 stack version has the following specifications Qinetiq anechoic response recorded 

  • A maximum RCS 62.15 m and
  • Average RCS of 7.92m
  • Height: 513mm.
  • Width: 365mm
  • Weight: 5.4kgs

The 3 stack version has the following specifications Qinetiq anechoic response recorded

  • Maximum RCS 86.04m and
  • Average of 12.01m
  • Height: 706mm.
  • Width: 365mm
  • Weight: 7kgs 


Echomax 400PE

EM230 and EM305PE 

EM230 Has ships Wheel Mark Certification for life boats and rescue craft and has been successfully tested by Qinetiq to ISO 8729-1999.  It has been allocated NATO stock no 5840-99-742-6193
and is used by UK, US and other forces around the world
Qinetiq anechoic response recorded
  • +/-3 24m maximum Stated Performance Level (SPL) +/-3 4.7m
  • Height: 610mm.
  • Width: 245mm
  • Fixing holes 8mm.
  • Fixing Centres: 569mm
  • Weight 2.3kg


Meets Qinetiq to ISO 8729-1999. 

NATO stock no. 5840-99-812-8790

  • Maximum RCS 62m2
  • Average RCS 10m2
  • Height 720mm
  • Width 338mm
  • Weight 5kgs




EM230 Basemount

Echomax 230_basemount

EM230 Basemount Ideal for fisheries or fish farms. Factory fitted with optional DOT all round white navigation light, DOT tricolour , Hella LED light or a light or your choice. Shown here with a Sealite SL15

Chosen by the RNLI as best reflector for their fleet of 400 RIB's. After capsize tests and exhaustive sea trials, the Midi recorded 100% paints at 3.8 miles and 80% paints at 5 miles plus in sea state 'fair' although mounted only 2m above sea level. (RORC/ORC recommend 4m above sea level).

All versions available in white, orange, yellow, red, green or black.



Echomax 313 S2

Designed where a high response is required but there is a limited amount of space in the buoys top mark.

EM305 BM2 fitted with two stack 313 mm maximum RCS of 63.1M2 and an average of 8.4M2 at +/- 3 degrees of heel

Dimensions length 475mm diameter 333mm

Fixing centers @ 200mm pcd

Fixing holes 4 x12mm female



Echomax 305PE

Echomax 305PE

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

Following a year of sea trials the US Navy SubPac Division Hawaiichose 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 10m²which 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

Following tests and interests from the French Navy, recents tests have been carried out by QinetiQ for response to the Nato frequencies 8 - 18 Ghz (I and J band) see below.

For linear diagram click here (New 305PE fitted with enhanced array tested to Nato frequencies I and J band)

For 5220 linear diagram click here (New 305PE fitted with enhanced array)

For 5221 linear diagram click here (New 305PE fitted with standard array)

For 56 linear diagram click here (Glass fibre model fitted with enhanced array identical to 5220)

For line drawing click here

Available in White, Yellow, Red, Green, and Black PE




Custom made version of the popular EM305PE but with flat top and base used to upgrade existing buoys or top marks, marine or land hazard - mooring platforms - pedestal mounted version available etc

Used by Renewable Energies on their Water turbine off the Shetland Islands.

Standard base fixings of 4 x 12mm female fixings @ 200mm PCD -Optional top fixings to suit chosen navigation light.


  • Case Height 68.5 cm | Diameter 33.3 cm
  • Approx. Weight 7 Kg |
  • Available in White, Yellow, Red, Green or Black
  • Maximum RCS 62m2 | Average RCS+/- 3 deg 10M2


  • Case Height 68.5 cm | Diameter 33.3 cm
  • Approx. Weight 7 Kg | Standard fixings top and bottom – 4 x 12mm female fixings at 200mm PCD
  • Available in White, Yellow, Red, Green or Black in high quality UV resistant Virgin PE





Custom made for Trinity House. QinetiQ testing proved the Echomax 305 to give an incredible response of 12 seperate 50sq.m peaks @+/-3°@30° intervals with an astonishing peak of 63m². Trinity House are currently testing two EM305 TH reflectors on lateral buoys Black Deep-7 and Barrow-7 off Harwich.

Available in base or pedestal mount.


  • Length (case only): 680mm
  • Length (with light without pedestal): 995mm
  • Circular base: 400mm
  • Square base: 433mm
  • Overall Diameter: 325mm
  • Fixing Holes: to be specified
  • Weight: from 5kg depending upon array composition
  • Polar diagram to be added shortly
  • Superseded by EM305 FPMS

 EM313 S2/S3


New two stack Echomax array made from 1mm stainless with provision for 25mm central rod fixing enabling easy connection of lifting eye, St. Andrews Cross etc. or navigation light. With massive QinetiQ proven maximum response of 63.1M2 and average at plus or minus three degrees of 8.4M2. Where sufficient space is available the more powerful EM313-S3 may be used


  • Width: 313mm (S3 - 313mm)
  • Height: 438mm (S3 - 660mm)

Base fixings:

  • 4 x 8mm at 80mm centres
  • Weight: 4kg (S3 - 6kg)

For linear diagram click here

 Echomax EM305BML & Echomax EM400BML


Customised versions of the 305 and 400 units with maximum responses of 63.1M2 and 229.3.M2 now being used by foreign navies for target use. Units illustrated utilise IMCO approved yacht navigation lights visible up to 2nm with 2 core electric cable for independent 12v supply. These lights can be substituted by any of the popular Sealite solar powered battery lanterns subject to customers specification ie Sealite SL15 1NM or SL 60 or 70 for 2NM.

The EM305BML and EM400BML are both supplied with base fixings @ 200pcd The EM305BML and EM400BML units are base fixed by 4 x 12mm female base fixings at 200 mm pcd centres.

For EM305BML line drawing click here

For EM400BML line drawing click here

Specification EM305BML EM400BML

  • Width 338mm 410mm
  • Height (ex light) 730mm 890mm
  • Wt 5.3kg 10.2kg
  • Max RCS 63.1M2 229.3M2
  • SPL 10.00M2 54.6M2
  • Fixings Top to suit to suit
  • Female Base Fixings 4x12mm @ 200mm pcd

Stainless Steel Pedestals

  • Width: top 26cm base 30cm
  • Height: 114cm
  • Wt: 10kg
  • Fixings top and bottom: 4x12mm @ 200mm pcd

All mounting brackets are optional extras



New top mark for buoys or land hazards, massive 75m2 RCS response with robust 5mm thick UV resistant PE case will support the heaviest navigation lights : 4 x 12mm base fixings @200mm PCD for pedestal mounting. Optional top fixings to suit. Available in I.A.L.A Red, Green or Yellow. Stock stainless pedestals available Replaces EM305 BM2/3 & EM305FPMS - EM305TH


  • EM325 - 2 Stack - Ht 513mm, Dia 365mm, Wt 5.4kg
  • EM325 - 3 Stack - Ht 706mm, Dia 365mm, Wt 7kg


Echomax 400PE

Developed for Scandinavian made Ice buoy to give enhanced radar visibility. The picture shown has neutral PE case but these can be made in red, green or black etc.


  • Overall height: 885mm
  • Width: 410mm
  • Weight: with neutral PE case 6.5kg with coloured case 7.3kg

For linear diagram click here

Echomax 400PE

EM400 as used by the Canadian Coast Guard



Latest edition to the Echomax range with massive response ideal for target use.

  • Maximum radar cross section 361.1m2
  • Average RCS over +/- 3 degrees of heel = 68.1m2
  • Height 1055mms
  • Diameter 500mms
  • Weight according to material

Click here for Qinetiq Linear diagram

ECHOMAX RADAR REFLECTORS - TOP MARKS - the professionals choice

Andrew Ridley, Conservancy Operations Manager of Tees & Hartlepool Port Authority Limited first discovered Echomax at Seawork 2001. He was so impressed with their QinetiQ test results and a series of on-site tests that he insisted Echomax arrays were fitted into all the new Eason Marine buoys which he was in the process of ordering. Eason Marine, probably one of the largest suppliers of navigation buoys in the U.K, modified their top marks and cases to suit the EM230/305 arrays. Since they have been laid he has received unsolicited compliments regarding both the radar response and visibility of these units. It was confirmed that the radar response from the Eason Polyethylene 2.4m maintenance free buoy fitted with Echomax arrays was at least equal to if not better than 3m steel buoys fitted with 32" octahedral reflectors. (It is probably only the sheer mass of the metal buoys which has enabled the octahedral reflectors to be fitted for so long).
Mr. Ridley was also receiving complaints from the Harbour Master when another commercially available reflector fitted to a GRP pilot boat built in 2000 provided inconsistent response resulting in loss of the traces on the VTS radar.
New white and orange Echomax 230's have now been fitted to all seven vessels in Tees & Hartlepool Port Authority's pilot and workboat fleet to comply with SOLAS Chapter V regulation 19.

(Andrew Ridley is too much a gentleman to state that the poorly performing radar reflectors he removed from his vessels were Firdell Blippers 210-5, 210-7 and Firdell Pilot 300's).

Tees & Hartlepool Pilot Vessel Coatham, fitted with a custom made Echomax EM 305 reflector, built into the radar/mast structure on the wheelhouse roof.

As there was insufficient mast height to fix a standard EM305, a customised 305 was fitted into a GRP roof box/mast support. Although additional height above sea level would have been beneficial it was reported that the EM305 gives a much improved response signal. An EM305 fitted to a fixed wooden finger jetty has enhanced the radar signal through all tidal states and avoids the reflection being lost when a combination of high tide and sea clutter would otherwise have caused problems to approaching vessels.

Sea Trip on Trinity House vessel Vectis to view Barrow - Black Deep 7 fitted with Echomax EM 305 Top mark After just one and a half hours steaming from Harwich on the Trinity House Vessel Vectis, Black Deep 7, green channel buoy was picked up 6.84 miles ahead. The Skipper of Vectis remarked that Echomax radar response was brighter than 11m Sunk Tower beacon with top mark. Half a mile closer we picked up the response of corresponding Trinity House Red Inner Fishers buoy. The very calm sea conditions did not demonstrate the superior response given by Echomax at heel. All parties are aware that the Decca scanner is set very low on the Vectis mast and had this been higher all objects may well have been picked up earlier.

Cefas SmartBuoy with EM230 radar reflector mounted.

Deployed in Liverpool Bay the unit is used to monitor water quality. Data is telemetered back to Cefas every 2 hours and used in assessments and modelling projects. There are currently 6 active SmartBuoy sites and there are smaller guard buoys to mark bottom lander deployments. Cefas have stated they like to use Echomax radar reflectors on all their buoys, due to the improved performance over the conventional design, and get a radar return from about 3NM in good conditions. They hope this makes the buoys more visible to shipping and thus avoid being hit!

Echomax comment – The reflector mounting height is only 2m considerably reducing the distance response.

Following the development of the Tees & Hartlepool buoys, Eason Marine - XJF - Orchid now recommend Echomax as a standard fitting on all new Polyethylene buoys. Echomax custom made arrays - reflectors have been supplied world wide to Sealite Australia -USA , Corilla, Orchid, Norfloat, JFC,GoDeep, Pharos, Tideland UK and USA, Hippo, Manuplas, E.Y.E., and Mobilis and as far a field as Australia, USA, Canada. Nigeria, China, Malta, Singapore, Indonesia, UAE and Argentina. The Canadian Coast Guard chose our EM400 arrays for their new series of 300 navigation buoys and our EM230-313-400 are used by the US Navy on their Nuclear Submarines and as targets and by many other foreign navies.

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EM230 Midi Basemount with Sealite SL15 Solar Lantern

EM305 FPMS with Sealite SL70 Solar Lantern

EM305 FPMS with Carmanah 650 Solar Lantern

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The Mighty Spartacat built by South Boats and fitted with Echomax EM230 Radar Reflector

Three Counties, the new Fisheries Research Vessel built by Mustang Marine fitted with the Echomax EM230 Radar Reflector.

Dolphin III a new 9.95m catamaran built by Cheetah Marine fitted with Echomax EM230 Radar Reflector.