Aerials and/or Arrays

Post here about equipment carried on ships
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Little h
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Re: Aerials and/or Arrays

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Before continuing with the variations identified between the aerials and/or arrays in the series of posts relating to......

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Vive La Différence

The Trifecta!

USS Gravely (DDG-107) Flight IIA; USS Carney (DDG-64) Flight I; USS Porter (DDG-78) Flight II; Moored alongside each other at Faslane.

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.......I've decided to interrupt with the an observation made whilst searching images of Arleigh Burke Class ships, see:-

1st; Arleigh Burke Class ship (unidentified) berthed opposite USS Spruance DDG-111 with an array on the port upper yardarm
DDG-111-USS-Spruance-photo-013. seaforces.org (2).jpg

Caption reads:- Pearl Harbor, Hawaii - April 2016


2nd; Arleigh Burke USS Chung Hoon DDG-93 during a RAS
USS Chung -Hoon DDG-93 50193102 Navsource (2).jpg

Image Description reads (in part):- 180507-N-QE928-009. Pacific Ocean, May 7, 2018, The Arleigh Burke-class guided-missile destroyer USS Chung Hoon (DDG 93) prepares to receive fuel from the aircraft carrier USS John C. Stennis (CVN 74) during a replenishment-at-sea. .............................. Navy photo by Mass Communication Specialist Seaman Erika Kugler/Released.
Contributed by Dave Wright

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The search begins in an attempt to uncover the function of this array and whether it has been installed on more than one of the ships in the class (or indeed any other class of ship).
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Little h
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ivorthediver
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Re: Aerials and/or Arrays

Unread post by ivorthediver »

I wish you well Harry , If anyone can do it the moneys on you ;)
"What Ever Floats your Boat"
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Little h
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Re: Aerials and/or Arrays

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Vive La Différence - (continued - 2)

Further information relating to the aerial/antenna arrays at 2. 5. & 6. in the original and subsequent posts in this short series highlighting the variations.

In an effort to provide 'close-up' images of the arrays; examples from other ships in the Arleigh Burke class are used in this post. For comparison purposes an image taken on USS Blue Ridge LCC-19 has also been used.

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Little h wrote: Thu Apr 04, 2019 3:20 pm Vive La Différence


NavyLookout Retweeted
U.S. Naval Forces Europe-Africa/U.S. 6th Fleet
‏Verified account @USNavyEurope
Apr 1 2019

The Trifecta!

USS Gravely (DDG-107) Flight IIA; USS Carney (DDG-64) Flight I; USS Porter (DDG-78) Flight II; Moored alongside each other at Faslane.

That snapshot in time (above) provides an ideal opportunity to highlight observations of some of the variations/differences that are clearly apparent when viewing the image.

Legend

Upper port and stbd yardarms

1. USS Carney; this cylindrical shaped antenna array is not on the other two ships
2. USS Gravely; this appendage is different to those installed on the other two ships
3. USS Gravely; these planar arrays (x4) are absent from the other two ships
4. USS Gravely; this appendage is not apparent in this location on the other two ships
5. USS Gravely; this small dome differs from that on the other two ships in not being mounted atop a square box shaped appendage

Lower port and stbd yardarms

6. USS Gravely; these two arrays have a centre stub that is differently configured to those on the other two ships
7. USS Gravely; this appendage differs from those in the same location on the other two ships vis:- it has a dome attached unlike that on USS Porter (outboard ship); whilst the appendage on USS Carney is of an entirely different configuration
8. USS Carney; (see comments at 7. above)
9. USS Porter; (see comments at 7. & 8. above) the appendage differs in that it is without the domed extension attached
10. USS Porter; this appendage does not appear to be installed on the other two ships (in this position)


________________________________________________________

According to this diagram we are talking UHF antenna/arrays.
, USS The Sullivans DDG-68.png



AS 1735/SRC - various suppliers + a variation in composition/configuration

AS 1735/SRC

AS 1735_ SRC UHF antenna (2).png




CA3018 - AS 1735/SRC

CA3018 AS1735_SRC antenna.png


Variation in composition/configuration
, Military Nomenclature AS-1735SRC.png

, SB-2011.pdf
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Last edited by Little h on Sat Apr 20, 2019 5:50 pm, edited 1 time in total.
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Little h
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Re: Aerials and/or Arrays

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Vive La Différence - (continued - 2a)



Little h wrote: Sat Apr 20, 2019 3:14 pm Vive La Différence - (continued - 2)

Further information relating to the aerial/antenna arrays at 2. 5. & 6. in the original and subsequent posts in this short series highlighting the variations.

In an effort to provide 'close-up' images of the arrays; examples from other ships in the Arleigh Burke class are used in this post. For comparison purposes an image taken on USS Blue Ridge LCC-19 has also been used.

----------------------------------------------------------------------------------

Little h wrote: Thu Apr 04, 2019 3:20 pm Vive La Différence


NavyLookout Retweeted
U.S. Naval Forces Europe-Africa/U.S. 6th Fleet
‏Verified account @USNavyEurope
Apr 1 2019

The Trifecta!

USS Gravely (DDG-107) Flight IIA; USS Carney (DDG-64) Flight I; USS Porter (DDG-78) Flight II; Moored alongside each other at Faslane.

That snapshot in time (above) provides an ideal opportunity to highlight observations of some of the variations/differences that are clearly apparent when viewing the image.

Legend

Upper port and stbd yardarms

1. USS Carney; this cylindrical shaped antenna array is not on the other two ships
2. USS Gravely; this appendage is different to those installed on the other two ships
3. USS Gravely; these planar arrays (x4) are absent from the other two ships
4. USS Gravely; this appendage is not apparent in this location on the other two ships
5. USS Gravely; this small dome differs from that on the other two ships in not being mounted atop a square box shaped appendage

Lower port and stbd yardarms

6. USS Gravely; these two arrays have a centre stub that is differently configured to those on the other two ships
7. USS Gravely; this appendage differs from those in the same location on the other two ships vis:- it has a dome attached unlike that on USS Porter (outboard ship); whilst the appendage on USS Carney is of an entirely different configuration
8. USS Carney; (see comments at 7. above)
9. USS Porter; (see comments at 7. & 8. above) the appendage differs in that it is without the domed extension attached
10. USS Porter; this appendage does not appear to be installed on the other two ships (in this position)


________________________________________________________

According to this diagram we are talking UHF antenna/arrays.
, USS The Sullivans DDG-68.png
AS 390/SRC


390650_B01_AS390_N0913.pdf

, USS Ross (DDG 71) (66636010) wiki commons.jpg
, USS Blue Ridge (LCC 19) 1000w_q95-2 DVIDS.jpg



Type/Nomenclature (as yet) not found

, USS Thruxton DDG IMAG2172 Jen's blog (2).jpg

Source & Attribution Jen's Blog Jen's Navy Times "It's not just a job - it's an Adventure"
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Little h
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Little h
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Re: Aerials and/or Arrays

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Further to the previous posts relating to the antenna arrays type nomenclature AS 1735/SRC UHF antenna and AS-390/SRC UHF antenna, also sonic anemometer. Here are a number of variations in the manner of location and mounting combinations of same.

Continuing the effort to provide 'close-up' images of the arrays and for comparison purposes; examples are included from classes of ship other than just the Arleigh Burke class are used in this post.
1000w_q95 (2).jpg
190227-N-GY475-0034 [Image 5 of 5]
NORFOLK, Va. (Feb. 27, 2019) Electronics Technician 2nd Class Justin Sanders unhooks flags while working aloft aboard the Nimitz-class aircraft carrier USS Harry S. Truman (CVN 75)
(U.S. Navy photo by Mass Communication Specialist 3rd Class Joseph A.D. Phillips/Released)

,1000w_q95-1.jpg
160823-N-MY901-134 [Image 2 of 5]


ATLANTIC OCEAN (Aug. 23, 2016) Electronics Technician 3rd Class Elizabeth R. Tamayo, from Queens, New York, and Electronics Technician 3rd Class Jacob M. Roth, from Spartanburg, South Carolina, work aloft on electronic equipment aboard USS George Washington (CVN 73).
(U.S. Navy photo by Mass Communication Specialist Seaman Apprentice Krystofer Belknap)

1000w_q95 5.jpg
180705-N-OA516-00322 [Image 11 of 11]
U.S. 5TH FLEET AREA OF OPERATIONS (July 5, 2018) Fire Controlman 2nd Class Tierra Allen, washes down the Cooperative Engagement Capabilities antenna on the aft mast aboard the Wasp-class amphibious assault ship USS Iwo Jima (LHD 7)
(U.S. Navy photo by Mass Communication Specialist 3rd Class Kevin Leitner/Released)


1000w_q95 -4 (3).jpg
180705-N-OA516-00169 [Image 8 of 11]
U.S. 5TH FLEET AREA OF OPERATIONS (July 5, 2018) Electronics Technician 2nd Class Vincent Le washes down a forward mast yard arm aboard the Wasp-class amphibious assault ship USS Iwo Jima (LHD 7)
(U.S. Navy photo by Mass Communication Specialist 3rd Class Kevin Leitner/Released)

All attachments (above) are derived from originals in DVIDS (Defense Visual Information Distribution Service) website and/or Commons Wikimedia
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Last edited by Little h on Mon Apr 22, 2019 3:39 pm, edited 1 time in total.
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ivorthediver
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Re: Aerials and/or Arrays

Unread post by ivorthediver »

Well done Harry ,and although some of us don't pretend to know much of which you speak , you are obviously enraptured with your chosen subject of that there is no doubt . and one day we may offer you a promotion worthy of your enthusiasm for this topic ;) something like " Pointy Bits Liaison Officer" 1st class.[ only teasing ]

Much appreciated , none the less Harry
"What Ever Floats your Boat"
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ivorthediver
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Re: Aerials and/or Arrays

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Less my last comment be misconstrued as sarcasm Harry , can you answer a couple of nagging questions related to your specialised subject please .

1/ whilst the ariels bars rotate how is the connection maintained :?: is it some form of wiper element what rubs over a circular contact ring :?
2/ How is it that such a powerful device can transmit a strong signal without harming any adjacent crew members :?:
3/ are the signal patterns emitted from say a whip aerial directional and if so how is their chosen path established / maintained :?:
4/ are the signals emitted from say a rotating Ariel spherical or dished as they leave the bar from which it is emitted :?:
5/ if a collection of Aerials are in operation how are they synchronised so that they don't swamp those nearest pleas

I'm sure this is all basic stuff to you and may even have been answered before but is often the source of confusion to me as clearly they cant go around the ship switching things off and on each time they wish to use them in fear of damaging another asset aboard the vessel .......and if so what happens during a RAS where other ships are in close proximity .
"What Ever Floats your Boat"
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Little h
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Re: Aerials and/or Arrays

Unread post by Little h »

ivorthediver wrote: Mon Apr 22, 2019 3:21 pm Well done Harry ,and although some of us don't pretend to know much of which you speak , you are obviously enraptured with your chosen subject of that there is no doubt . and one day we may offer you a promotion worthy of your enthusiasm for this topic ;) something like " Pointy Bits Liaison Officer" 1st class.[ only teasing ]

Much appreciated , none the less Harry


Well thank you kind Sir, one tries to make an effort when dealing with these otherwise obscure spikey/pointy stuff :)
Little h
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Re: Aerials and/or Arrays

Unread post by Little h »

This post is the last in this short series relating to the antenna arrays type/nomenclature AS 1735/SRC UHF antenna and AS-390/SRC UHF antenna, also sonic anemometer.

Here are a number of variations in the manner of location and mounting combinations of same.

Continuing the effort to provide 'close-up' images of the arrays and for comparison purposes; examples are included from classes of ship other than just the Arleigh Burke class are used in this post.
, US Navy 100626-N-4830B-077 maintenance on the OE-82 antenna on yardarm on USS George Washington (CVN_73) wiki commons (2).jpg
USS George Washington action [Image 1 of 2]

Petty Officer 3rd Class Antonia Williams, electronics technician, from Lagrange, Ga., and Petty Officer 2nd Class Michael Milan, electronics technician, from Seattle, communicate with a safety observer as they perform maintenance on the OE-82 antenna on the yardarm aboard the aircraft carrier USS George Washington. The radar systems are located at the top of the ship's mast 218 feet above the waterline and can only be reached by climbing aloft.
(U.S. Navy photo by Petty Officer 3rd Class Danielle A. Brandt, mass communication specialist)
Source Wikimedia Commons

, US Navy 030426-N-7781D-023 Information Systems Technician 2nd Class Ryan Custer USS_Harry_S._Truman_(CVN_75) commons wiki.jpg
File:US Navy 030426-N-7781D-023

Apr. 26, 2003 Information Systems Technician 2nd Class Ryan Custer works aloft performing maintenance on one of the antennas aboard USS Harry S. Truman (CVN 75).
U.S. Navy photo by Photographer's Mate 2nd Class Andrea Decanini. (RELEASED)
Source Wikimedia Commons


A short description of the elements of a quarter wave antenna array
, Screenshot (4406).png
, Screenshot (4410).png

Note the component parts of the AS 390/URC Antenna Array in figure 2.22
Source Global Security 32 page PDF
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Re: Aerials and/or Arrays

Unread post by Little h »

ivorthediver wrote: Mon Apr 22, 2019 3:57 pm Less my last comment be misconstrued as sarcasm Harry , can you answer a couple of nagging questions related to your specialised subject please .

1/ whilst the ariels bars rotate how is the connection maintained :?: is it some form of wiper element what rubs over a circular contact ring :?
2/ How is it that such a powerful device can transmit a strong signal without harming any adjacent crew members :?:
3/ are the signal patterns emitted from say a whip aerial directional and if so how is their chosen path established / maintained :?:
4/ are the signals emitted from say a rotating Ariel spherical or dished as they leave the bar from which it is emitted :?:
5/ if a collection of Aerials are in operation how are they synchronised so that they don't swamp those nearest pleas

I'm sure this is all basic stuff to you and may even have been answered before but is often the source of confusion to me as clearly they cant go around the ship switching things off and on each time they wish to use them in fear of damaging another asset aboard the vessel .......and if so what happens during a RAS where other ships are in close proximity .
1/ yep slip rings or as you describe them wiper element - centimetric radars using waveguides feeding into the reflectors -
today there are also active and passive antenna systems
2/ crew members will not be anywhere near a transmitting antenna, the safe to transmit keys etc will have been removed and lodged in the Bridge or with QM if alongside. A radar antenna can still be rotating without actually transmitting.
3/ singleton whips are omnidirectional. All antenna have a polar diagram that advises the radiation pattern.
4/ this could be a particularly complicated subject; lets say the emissions will be transmitted with a particular polarisation.... and can be conical, spherical, circular, switched etc etc ... sometimes the antenna will give the clue but modern antenna are highly sophisticated emission methodology - which is why I oft times copy the literature in support of images etc.
5/ No real need for synchronisity since they may well have significant frequency diversity/separation and there is always RAM (Radar Absorbing Material) However some antenna can and do rotate in a sychronised manner which gives a better picture below decks.
Last edited by Little h on Mon Apr 22, 2019 8:22 pm, edited 2 times in total.
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