Aerials and/or Arrays

Post here about equipment carried on ships
User avatar
ivorthediver
Posts: 3659
Joined: Fri Aug 10, 2018 8:42 pm
Location: Cambridge Shore Battery

Re: Aerials and/or Arrays

Unread post by ivorthediver »

Excellent and noteworthy post Harry , you must have been torn as to where to post this as it covers many topics both sides of the pond ;)
"What Ever Floats your Boat"
User avatar
Little h
Posts: 1727
Joined: Sun Aug 12, 2018 6:53 pm

Re: Aerials and/or Arrays

Unread post by Little h »

ivorthediver wrote: Thu Apr 04, 2019 4:33 pm Excellent and noteworthy post Harry , you must have been torn as to where to post this as it covers many topics both sides of the pond ;)
I have pondered for the last two days on this one Ivor; but believe that since the preponderance of variations highlighted are in fact Aerials and/or Arrays (even the CIWS mountings are integral with radar) ... that left only the hawse pipe really as an oddity in this thread.

Some supporting material to follow soon.
Little h
User avatar
ivorthediver
Posts: 3659
Joined: Fri Aug 10, 2018 8:42 pm
Location: Cambridge Shore Battery

Re: Aerials and/or Arrays

Unread post by ivorthediver »

Bring it on Harry :)
"What Ever Floats your Boat"
User avatar
Little h
Posts: 1727
Joined: Sun Aug 12, 2018 6:53 pm

Re: Aerials and/or Arrays

Unread post by Little h »

Vive La Différence - Correction

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!
#USSGravely, #USSCarney, & #USSPorter moor along side one another in Faslane, #Scotland. Gravely is underway as flagship of Standing #NATO Maritime Group 1 to conduct maritime operations & provide a continuous maritime capability for @NATO in the northern Atlantic.

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

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.

Anchor hawse pipe

15. USS Gravely; this ship appears to have reinforced shape on/around the stem aperature of hawse pipe on the bow, unlike those of the other two ships.




My claim made regarding the apparent reinforcing appears to be unfounded :oops: , see:-

USS Carney
DDG-64-USS-Carney-007 Naval Station Rota Spain July 2018 seaforces.org.jpg

USS Porter
USS Porter DDG-78 05017894 Navsource 160420-N-FQ994-197. Souda Bay, Greece, April 20 2016..jpg


Perhaps not so pronounced as on USS Gravely but the feature is there on both ships shown above
You do not have the required permissions to view the files attached to this post.
Little h
User avatar
Little h
Posts: 1727
Joined: Sun Aug 12, 2018 6:53 pm

Re: Aerials and/or Arrays

Unread post by Little h »

Vive La Différence - (Update)

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!
#USSGravely, #USSCarney, & #USSPorter moor along side one another in Faslane, #Scotland. Gravely is underway as flagship of Standing #NATO Maritime Group 1 to conduct maritime operations & provide a continuous maritime capability for @NATO in the northern Atlantic.

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

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



USS Gravely FFG-107 has form (history) Mast or Antenna - Antenna or Mast regarding broken/detatched antenna arrays ;) ... hopefully they know that that the inverted tapered cube (truncated square pyramid) element of this array is not under the dome!!!
DDG-107 USS Gravely -photo-012 Atlantic Ocean - March 2015 seaforces.org.jpg
Note; I have added a caption to this image (within red outline)
You do not have the required permissions to view the files attached to this post.
Little h
User avatar
ivorthediver
Posts: 3659
Joined: Fri Aug 10, 2018 8:42 pm
Location: Cambridge Shore Battery

Re: Aerials and/or Arrays

Unread post by ivorthediver »

Keep at it Harry , we are relying on you to keep track of it .....and whats amiss :!:
"What Ever Floats your Boat"
User avatar
Little h
Posts: 1727
Joined: Sun Aug 12, 2018 6:53 pm

Re: Aerials and/or Arrays

Unread post by Little h »

Vive La Différence - (continued)



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!
#USSGravely, #USSCarney, & #USSPorter moor along side one another in Faslane, #Scotland. Gravely is underway as flagship of Standing #NATO Maritime Group 1 to conduct maritime operations & provide a continuous maritime capability for @NATO in the northern Atlantic.
--------------------------------
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

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)

USS Gravely 107 Flight IIA, USS Carney 64 Flight I, USS Porter 78 Flight II at Faslane (2).jpg
USS Gravely DDG-107 160505-N-JE250-025_(791947259) commons wiki.jpg
Further to observations made at 6. above (now bolded) a search has revealed some info about the antenna array and that the 'stub' is at the base of a sonic anemometer mounted atop the antenna array. This is an Array Dipole and is described thus:-

Array Dipole

The array dipole antenna is designed for use in the 225-400 MHZ UHF range. It has a power rating of 2000 watts peak envelope power, with a VSWR not greater than 1.8:1. See figure 2-29.

The array consists of four broadband radiating dipole elements mounted an equal distance from each other and the mounting structure. It is fed from a single coaxial input and divided by an integral coaxial line matching transformer and feed line sections. All major supporting and radiating components are aluminum. It is designed to be mounted around masts of four to ten inches in diameter.

Source of excerpt above and Fig 2.9 image below; is Electronics Technician/Volume 7/Chapter 2 - ANTENNAS

330px-Electronics_Technician_-_Volume_7_-_Figure_2-29.jpg


There's more to come!!!
You do not have the required permissions to view the files attached to this post.
Little h
User avatar
ivorthediver
Posts: 3659
Joined: Fri Aug 10, 2018 8:42 pm
Location: Cambridge Shore Battery

Re: Aerials and/or Arrays

Unread post by ivorthediver »

" There's more to Come "


Never doubted it for a minute Harry , keep up the good work mate :)
"What Ever Floats your Boat"
User avatar
Little h
Posts: 1727
Joined: Sun Aug 12, 2018 6:53 pm

Re: Aerials and/or Arrays

Unread post by Little h »

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!
#USSGravely, #USSCarney, & #USSPorter moor along side one another in Faslane, #Scotland. Gravely is underway as flagship of Standing #NATO Maritime Group 1 to conduct maritime operations & provide a continuous maritime capability for @NATO in the northern Atlantic.

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

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
-------------------------------------------------------------------------
Little h wrote: Fri Apr 05, 2019 12:42 pm Vive La Différence - (Update)

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

5. USS Gravely; this small dome differs from that on the other two ships in not being mounted atop a square box shaped appendage



USS Gravely FFG-107 has form (history) Mast or Antenna - Antenna or Mast regarding broken/detatched antenna arrays ;) ... hopefully they know that that the inverted tapered cube (truncated square pyramid) element of this array is not under the dome!!!

DDG-107 USS Gravely -photo-012 Atlantic Ocean - March 2015 seaforces.org.jpg

Note; I have added a caption to this image (within red outline)
----------------------------------

This image of the installation on the stbd yard of USS Stockdale (DDG_106) derived from an original on Commons Wiki shows a close up of the dome on top of or surrounding the irregular inverted tapered cube (irregular truncated square pyramid)
, USS Stockdale (DDG_106) in the U.S. 5th Fleet area 130523-N-HN991-175.jpg

Caption reads; U.S. Navy Electronics Tech 3rd Class Tanner Huston cleans antenna on lower yardarm on foremast USS Stockdale (DDG_106) 130523-N-HN991-175
You do not have the required permissions to view the files attached to this post.
Little h
User avatar
ivorthediver
Posts: 3659
Joined: Fri Aug 10, 2018 8:42 pm
Location: Cambridge Shore Battery

Re: Aerials and/or Arrays

Unread post by ivorthediver »

Nice photo Harry .
"What Ever Floats your Boat"
Post Reply Previous topicNext topic

Return to “Ships/Boats Equipment”