Author Topic: Long Range Laser Lineup System  (Read 8418 times)

GOONIE

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Long Range Laser Lineup System
« on: February 28, 2014, 07:11:26 pm »
This was in the CV Procedures doc for the T-45C Spaz posted:

Long Range Laser Lineup System
The small size of the landing area requires precise lineup control by approaching aircraft. The nature of angled deck carriers presents a unique challenge to arriving aircraft, because the landing area is constantly moving from left to right relative to the nose of the aircraft. To aid aircrew during the approach, carriers are equipped with a Long Range Laser Lineup System. The Long Range Laser Lineup System uses eye-safe, color-coded lasers to provide visual lineup information to approaching aircraft. These low intensity lasers are projected aft of the ship and are visible out to 10 miles at night. Figure 1-7 illustrates the visual presentation of the Long Range Laser Lineup System.

Has anyone ever seen this system, or know if it is in use?  ??? I have never heard of it and can't seem to find much info besides the figure it shows. Would be curious to see what it looks like to the pilot when in the groove.

GOONIE
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Striker

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Re: Long Range Laser Lineup System
« Reply #1 on: February 28, 2014, 08:46:00 pm »
The following may shed some light on what the pilot sees and the progress up to 2002, where the information seems to fall off other than it appears the system was funded to be active.

From the following:
APPROVED NAVY TRAINING SYSTEM PLAN
FOR THE
AIRCRAFT CARRIER
VISUAL LANDING AID SYSTEMS
N88-NTSP-A-50-9202A/A
NOVEMBER 1999

Long Range Line-Up System.
The unit provides a light source appearing to the pilot as a single point of light emanating from below the landing area threshold (ramp of the ship). The system is designed such that the pilot sees a yellow light when on the proper centerline approach. A slight misalignment to the right of centerline will be indicated by a steady green light. A further right misalignment will be indicated by a slow flashing green light. An extreme right misalignment will be indicated by a fast flashing green light. Likewise, a slight misalignment to the left of centerline will be indicated by a steady red light. A further left misalignment will be indicated by a slow flashing red light. An extreme left misalignment will be indicated by a fast flashing red light.

The Deck Edge Unit allows for movement in the pitch and roll axis to provide a stabilized light source in space for the approaching pilot. Stabilization input signals provide a level sensor internal to the stabilization platform assembly. These inputs are processed by a stabilization control subsystem, which supplies drive signals to the Deck Edge Unit. The operator control station located in PRI-FLY is the primary point of control. LRLS will not replace any system.

TECHEVAL for the LRLS was conducted onboard the USS Carl Vinson (CVN-70) in November 1997. Further testing to complete shore based TECHEVAL is currently being conducted and will be completed in May 1999. The LRLS will be introduced to the fleet under the Fleet Modernization Program, Service Life Extension Program, and new ship construction program.

LRLS is scheduled to come on line in June 1999. It will be included into C-670-2010, Optical Landing System Maintenance, at NATTC DET Lakehurst.

Operation and Maintenance Manual. The Operation and Maintenance technical manual required to support the LRLS will be a commercial manual and will be developed by Raytheon E-Systems per the TMCR 41-96 in NAWCADLKE-ILSOW92057A. The technical manual number is NAVAIR 51-50ABA-6. The formal technical manual will be available in fourth quarter FY99. Exact delivery dates and locations are not known at this time, but will be incorporated in future NTSP updates. LRLS delivery schedule is anticipated as follows:
o   First quarter FY00 - Four shore-based systems
o   Third quarter FY00 - Seven shipboard systems
o   Second quarter FY01 - Six shipboard and six shore based systems

The plan is to provide a fully operational LRLS to the NATTC Lakehurst in July 2000 for use as an operation and maintenance trainer. Landing flight simulators at the LSO Schools require modification to present the LRLS display by June 2000. No TDs are required.

19 Mar 1997 “Flight Global” news story states:
RAYTHEON E-SYSTEMS is to develop a laser-based landing aid for US Navy aircraft carriers.
A six-month sea trial of a prototype system has been conducted on the carrier USS Constellation and, according to Burger (Raytheon E-Systems director of international and advanced programmes), landing-safety officers believe that pilots are as proficient after three to four landings using the LRLS as those completing 30-50 landings using the conventional alignment system.
The LRLS costs $200,000-300,000, and the Navy plans to acquire 31 systems for carriers and training bases. Possible future applications include helicopter carriers and helicopter-equipped warships. Raytheon E-Systems has also proposed a covert, portable system to the US Air Force. This uses infra-red lasers and flash rate instead of colour.

Hope this helps.
Respectfully,
Striker



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SpazSinbad

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Re: Long Range Laser Lineup System
« Reply #2 on: February 28, 2014, 09:24:55 pm »
Thanks for the info 'Striker'. You may not be aware that in the mid 1960s to late 1960s there were several groups of RAN FAA would be pilots trained in the USN at Pensacola. [My flying course just missed out on going to the USofA - to be trained with the usual RAAF system initially - mine began in 1967.] Because of this aspect the PDFs contain a lot of info about the Mentor and Trojan with examples of these USN trained chaps being CarQualled in the T-28C - however all then went to Helicopter training in the US to later either fly Wessex or Iroquois (in Vietnam with US Army). Some of these helo chaps then transitioned to the A4G Skyhawk in the early 1970s.

I know it probably pains people to download large PDFs on speculation that they may be interesting or even informative or useful.  ;D Yes I can break up the large PDFs into smaller named pieces but how long is a piece of string?  ::) ;D But anyway the 'how to deck land' PDFs online have long range line up info and some will be reproduced below or pointed to online if those links (in the PDF) still work....

“Roger Ball” high tech style Wings of Gold, Summer 2002 by Holland, Art
http://findarticles.com/p/articles/mi_qa3834/is_200207/ai_n9086662/?tag=content;col1 [DEAD LINK]
"...Another new landing aid for the pilot is the Long Range Lineup System (LRLS). It is mounted just below the flight deck on the aft end of the ship. The main unit contains an optical head containing 10 Lasers (4 Red, 1 Yellow, 5 green), masks, and filters which form 7 corridors indicating position of aircraft relative to flight deck centerline. A base houses the power supply and the pitch/ roll stabilization system.

LRLS provides line-up information to the pilot from six nm to about .65 nm astern the ship. LRLS complements IFLOLS by providing visual cues to the pilot that facilitate the early interception of centerline at night. When on centerline the pilot sees a yellow light. When deviations occur, the pilot will see either a steady green light, if right of centerline, or a steady red light when the aircraft is lined up to the left. As deviation increases to the left or right, the corresponding light begins to flash. The more rapidly the lights flash, the further the pilot is away from an optimum flight path. LRLS augments the existing Automatic Carrier landing System (ACLS), Instrument Landing System (ILS) and Visual Landing Aids (VLA) by allowing a more seamless transition from instruments to visual cues for landing. Because it provides a more accurate means of evaluating position left or right of centerline, LRLS ensures lineup remains a prominent part of the pilot’s visual scan. By reducing the requirement for close-in line-up corrections, as well as minimizing radio transmissions between the pilot and the LSOs, LRLS is effective in decreasing pilot workload and increasing confidence...." Graphic here: http://static.howstuffworks.com/gif/aircraft-carrier-22.gif will be reproduced with text and attached.

And another dead link: http://www.hrana.org/documents/PaddlesMonthlySeptember2011.pdf It seems the USN has taken offline a lot of information that will be found now in the PDFs I have mentioned ad nauseam online today.  :D
_____________________________

Victory for Long Range Lineup System (LRLS)!!!!
http://www.hrana.org/documents/PaddlesMonthlySeptember2011.pdf
"We fought for it and we got it!!!

As we face a future of increasing fiscal austerity, we can expect funding for everything from flight hours to aircrew equipment to potentially find itself on the chopping block. Over the last few years, one system that has continually been identified for elimination is the Long Range Lineup System (LRLS). After hearing that plans for the USS Gerald Ford (CVN-78) did not include installation of LRLS and already-installed systems could potentially face elimination of the funding required for support and maintenance, the LSO community addressed the issue at both the 2010 and 2011 Operational Advisory Group Conference. The across-the-board consensus was that LRLS is the primary source of lineup information prior to the ball call for all aircraft not equipped with a HUD.

However, even though we included it in our LSO Top 5 each year, this was still not enough to secure LRLS’s future. After some investigation by the LSO School Staff, it was discovered that if LRLS is a requirement to pass Flight Deck Certification then it would then become a required piece of equipment on all fleet carriers. That has now become a reality and the future of the Long Range Lineup System is now secure."
_________________________

BEAR IN MIND I think this new fangled stuff is just amazing. In my now very old experience in VF-805 [poor man fleet defence similar to the mid to late 1960s A-4B/C USN ASW carriers VSF squadrons/detachments] I had only the old not as accurate as todays TACAN and Mk.1 eyeball to land an A4G Skyhawk aboard HMAS Melbourne, a 19,000 ton Light Fleet Carrier (from WWII era but fitted with 5.5 degree angle deck, mirror and steam catapult of 100 feet - upgraded to 105-10 feet in my time onboard). The CCA was same as the GCA of the day via an old Sea Venom radar (which was good for the time). Visual all the way with no auto anything (A4Gs did not have APC Auto Power Control). It was fun in the daytime but very difficult at night - IF ONLY FOR THE LINE UP PROBLEM!  ;D With NO HUD then it was all as described earlier - AoA Indexer and Meatball, Lineup and Airspeed (Optimum Angle of Attack).

Perhaps there is a perception that the PDFs are ONLY about the A4G or the RAN FAA Fixed Wing - they are not. The 'how to deck land' section or the 'htdl' specific PDFs contain information from all parts of the globe with of course emphasis on the only real player today the USN. OK?  :o

« Last Edit: February 28, 2014, 10:17:25 pm by SpazSinbad »
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