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Carrier Landing Systems  
User currently offlineTsentsan From Singapore, joined Jan 2002, 2016 posts, RR: 15
Posted (12 years 3 months 16 hours ago) and read 4986 times:

Hi guys,

Dont know if this has been mentioned before, just wanted to find out if US type Aircraft Carriers (eg Nimitz class, Enterprise etc) have a sort of ILS based landing system for their aircraft or do they have to rely visually?

Thanks
Tsentsan


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9 replies: All unread, jump to last
 
User currently offlineUSAFJR From United States of America, joined Apr 2002, 146 posts, RR: 0
Reply 1, posted (12 years 3 months 13 hours ago) and read 4941 times:

They must have some sort of something or they wouldnt make night landings so often.

User currently offlineWoodreau From United States of America, joined Sep 2001, 1017 posts, RR: 6
Reply 2, posted (12 years 2 months 4 weeks 23 hours ago) and read 4915 times:

Carriers are fitted with the Automatic Carrier Landing System which allow certain aircraft to be "auto-landed" onto the carrier. Not all carrier aircraft can use the system however. Whether it's popular with the aircrews is another matter. (I don't think it is.)

F-14s aren't equipped with ACLS (I don't think).
F-18s are.

Otherwise landings are all done visually day and night without any automatics.

There are flight deck lights and the drop line lights to help the pilot land onboard. If the carrier is operating close to friendly land, the returning aircraft have an option to divert to land, otherwise the carrier is the only place to land and the pilots just keep trying and trying until they get back onboard.

The fun part is when they turn out the flight deck lights, try landing with NVGs  Smile I think helo pilots have it harder when they are using NVGs to land. Try putting a helo onto a pitching flight deck 100ft x 35ft wide with no lights at night. You realize very quickly how important peripheral vision is in trying to land. You're missing a lot of visual cues that you have during the day. There is no equivalent automatic landing system for helicopters.

Cheers  Smile
Woodreau / KMVL




Bonus animus sit, ab experientia. Quod salvatum fuerit de malis usu venit judicium.
User currently offlineJwenting From Netherlands, joined Apr 2001, 10213 posts, RR: 19
Reply 3, posted (12 years 2 months 4 weeks 19 hours ago) and read 4904 times:

But at least with an Oceanhawk you can divert to a destroyer that can winch you aboard. Haven't seen that happen to a Hornet yet  Smile/happy/getting dizzy
Last time aircraft were pulled aboard ship by attaching a rope to it and pulling was in the 1920s I think. Simpler times, but probably just as scary (if not more so) for the young crews.



I wish I were flying
User currently offlineFlyn From United States of America, joined Apr 2002, 76 posts, RR: 0
Reply 4, posted (12 years 2 months 4 weeks 17 hours ago) and read 4899 times:


I Watched one landing on Wings all white deck on the ship (snow) And snowing like crazy and the pilot said he didn't see anything until the jet came to a sudden stop . he saw a ground crew walk in front the jet when it stopped. I think its the other way around to the ground crew is flying the aircraft by telling the pilot what to do. Would have to be a little different because the ship moves.

I know they winch helicopters down in heavy wind




User currently offlineContact_tower From Norway, joined Sep 2001, 536 posts, RR: 1
Reply 5, posted (12 years 2 months 4 weeks 14 hours ago) and read 4898 times:

I think a TACAN is installed on many carriers, or am I wrong? (Not 100% sure)

User currently offlineWoodreau From United States of America, joined Sep 2001, 1017 posts, RR: 6
Reply 6, posted (12 years 2 months 4 weeks 8 hours ago) and read 4889 times:

Found it...

The system is called the AN/SPN-46 ACLS. It has a I/K-band radar. The I-band radar probably find the aircraft and the K-band is the datalink.

Has three modes:
Mode 1 - full autoland
Mode 2 - "ILS mode" provides landing cues to the pilot
Mode 3 - carrier-controlled talk-down mode


On a separate topic

All aviation capable ships in the Navy and Coast Guard have the AN/URN-25 TACAN system installed so that aircraft can find the ship in the middle of the ocean. The TACAN channel assignment for ships can be easily changed. I guess landbased TACAN stations channels can be changed too, but then you'd have to update the charts as well.

There are standard non-precision TACAN approaches published for ships.


The winch is part of the RAST (Recovery Assist Securing and Traversing) system. The winch is built into the HSD (helicopter securing device, called the "Beartrap") basically a big sturdy metal frame with "teeth" which latches onto the helo probe after it's hauled down onto the flight deck. The HSD then moves the helo into (or out of) the hangar.

Cheers  Smile
Woodreau / KMVL



Bonus animus sit, ab experientia. Quod salvatum fuerit de malis usu venit judicium.
User currently offlineSTT757 From United States of America, joined Mar 2000, 16810 posts, RR: 51
Reply 7, posted (12 years 2 months 4 weeks 4 hours ago) and read 4871 times:

Lakehurst designs and builds such systems to support the fleet,

http://www.lakehurst.navy.mil/nlweb/directory-aboutus1.htm



Eastern Air lines flt # 701, EWR-MCO Boeing 757
User currently offlineTsentsan From Singapore, joined Jan 2002, 2016 posts, RR: 15
Reply 8, posted (12 years 2 months 3 weeks 6 days 23 hours ago) and read 4864 times:

Woodreau,

Thanks man, there was very enlightening  Smile/happy/getting dizzy Was always wondering how they managed to hit the deck so nicely...



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User currently offlineJwenting From Netherlands, joined Apr 2001, 10213 posts, RR: 19
Reply 9, posted (12 years 2 months 3 weeks 6 days 22 hours ago) and read 4860 times:

practice used to make perfect, and now they can have the machines do it all for them.
What is happening to this world  Laugh out loud



I wish I were flying
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