what is this ?

[Anas Ali]

what is this in black Circle ?
its almost in Every Egyptian ships

 

[Roybot]

Radar Antenna

 

[Anas Ali]

really?

i was hoping for more classification like : IFF or EW or search radar and of course the type and range if possible

 

[EagleEyes]

@Penguin will do it.

 

[Bilal.]

Seems like marine navigation radar but why does one ship has multiple?
@Penguin

 

[Penguin]

Probably Racal Decca 1290 navigation radars, or RM-1290 I-band Chinese copies.

books.google.nl/books?id=4S3h8j_NEmkC&pg=PA302&lpg=PA302&dq="Racal+Decca+1290"&source=bl&ots=hIZvLQW-dZ&sig=EcuIO-xZjyKlPQFCEfIUGlu0Y14&hl=nl&sa=X&ei=Z1SSUsncJcaLtQbDuoGgDw&ved=0CDIQ6AEwAA#v=onepage&q=%22Racal%20Decca%201290%22&f=false

These are widely used by warships, in part also because many civilian ships also use these: a warship operating these navigation radars doesn't stick out as a warship but produces a merchant electronic signature.

In December 1996 the US corporation Litton Industries bought Racal-Decca Marine, as well as Sperry Marine and C.Plath, under the Litton Marine Systems name. The Decca name, engineering, and design continued to be used on the BridgeMaster II and, in 1998, the BridgeMaster E series of radars was launched. The Sperry section of Litton Marine Systems, based in Charlottesville, Virginia, was already producing its own line of marine radars, the Rascar, at the time of the acquisition but this was replaced by the BridgeMaster E. The Rascar had been the American-made radar used in the American Navy and Coast Guard but eventually the BridgeMaster E made inroads there as well. Competitors at the time included Gold Star and Furuno.

Northrop Grumman acquired Litton Industries in 2000 and this eventually heralded, in 2004, the end of the use of the Decca name on radars after a period of more than 50 years. In 2006 the VisionMaster FT series of marine radars replaced the aging BridgeMaster E series.

Decca Radar - Wikipedia, the free encyclopedia

Why multiple units? Well, ... likely to avoid blind spots in coverage:

The Dual-Channel option provides the ability to display data from two independent transceivers onto the same screen and targets can be tracked on both channels. The overlapping of the information from the two radars eliminates any blind spots that may occur when a single radar is restricted providing unsurpassed situational awareness.

http://www.sperrymarine.com/sites/default/files/downloads/1665978425/ARPA_Radar_VisionMaster_FT.pdf

See also Sperry Marine

In addition, you might use complementary radars in different bands (e.g. S aka E/F and X aka I bands), which I presume would also mitigate the risks of being jammed.

http://www.northropgrumman.com/Capa...TRadar/Documents/visionmaster_radar_ecdis.pdf

 

[Penguin]

Main Features
Asynchronous Secondary Radar Input
The BridgeMaster E tactical display can show input from a totally asynchronous radar.
This second input can be from either a BridgeMaster E transceiver or, in some instances, from another manufacturer’s radar. Any combination of radars can be used, e.g., two X(I)-band radars or an X(I)-band and an S(E/F)-band or an X(I)-band and an RRB. Using a second input from another BridgeMaster E radar allows the operator to control both radars through a single display. Plus, the operator can track targets from either radar, and the software ensures that a target will only be tracked once.

http://132.228.182.15/solutions/marineradar/assets/bme-military.pdf

Thirdly, multiple radars also provide redundancy.

Kingston Class - Radar

 

[Anas Ali]

nice
great info from a great member
thanks a lot penguin

 

[Anas Ali]

http://132.228.182.15/solutions/marineradar/assets/bme-military.pdf

Thirdly, multiple radars also provide redundancy.

Kingston Class - Radar

another question > what are these radars in Circle ?

 

[Natan]

another question > what are these radars in Circle ?

Probably communication antennas.

 

[Rashid Mahmood]

another question > what are these radars in Circle ?

The Foremast has the electronic warfare sensors, models Elsag Mk 100 on both sides.
Aft mast is probably Satcomm antenna.

 

[Anas Ali]

The Foremast has the electronic warfare sensors, models Elsag Mk 100 on both sides.
Aft mast is probably Satcomm antenna.

thanks alot

 

[Penguin]

The Foremast has the electronic warfare sensors, models Elsag Mk 100 on both sides. Aft mast is probably Satcomm antenna.

Yep
EW: Elsag Mk-1000, Mk 1600, K 1900, Ceselsa DENEB or Inisel CANOPUS, depending on ship.
The Naval Institute Guide to World Naval Weapon Systems - Norman Friedman - Google Boeken

Elettronica Beta intercept/jamme suite
The Naval Institute Guide to Combat Fleets of the World: Their Ships ... - Google Boeken

I'm inclined to call the rear mast thingy a radar.

 

[Anas Ali]

thanks penguin

 

[Rashid Mahmood]

Yep
EW: Elsag Mk-1000, Mk 1600, K 1900, Ceselsa DENEB or Inisel CANOPUS, depending on ship.
The Naval Institute Guide to World Naval Weapon Systems - Norman Friedman - Google Boeken

Elettronica Beta intercept/jamme suite
The Naval Institute Guide to Combat Fleets of the World: Their Ships ... - Google Boeken

I'm inclined to call the rear mast thingy a radar.

The aft mast structure cannot be a radar as their is already an air/surface search radar next to it.
2 radar antenna's are not co-located so near to each other.
Most probably it is the Elettronica Beta Intercept/Jammer suite: Telegon HFDF.