ASW technologies and techniques
- Thread starter Todjaeger
- Start date
I think there would be some SSN's that would out race all surface ships including aircraft carriers. They can definately go faster than 30 kts. Sure they would be noisy, but if it came to a flat out race they should outrun all surface units.
The best thing to get rid of a sub is a sub fitted with a very effective torpedo, like the mk-48 cbass series. These are sub killers in a very effective package able to do things subs, surface and towed arrays can't.
The best thing to get rid of a sub is a sub fitted with a very effective torpedo, like the mk-48 cbass series. These are sub killers in a very effective package able to do things subs, surface and towed arrays can't.
Well ive heard unoffical, unsubstanciated, claims (from trusty worthy people) that SSN's can go well beyond 40kts. I wouldn't be that suprised is some us SSN's could top over 80 or 90 kmph, if required (not very often).
Depending on how far away you are, that might be fast enough to outrun helicopters or atleast out to there maxium range. Or even if they do find you, good luck trying to get a firing solution on something hussling that fast. Even a rocket torpedo would really struggle even if it knew exactly where you were when launched.
Depending on how far away you are, that might be fast enough to outrun helicopters or atleast out to there maxium range. Or even if they do find you, good luck trying to get a firing solution on something hussling that fast. Even a rocket torpedo would really struggle even if it knew exactly where you were when launched.
Fixed-wing ASW aircraft are mainly used for searching for submarines since they have greater on-station time than rotary-wing ASW aircraft.
ASW helos are normally held in a ready status and are sent aloft when there is a probable ASW contact. Otherwise they'd be burning gas and eating up pilot hours.
The ideal ASW helo situation is a pair of helos with dipping sonars. The chances of a submarine escaping the pair is slim.
But how many ships have space for two decent ASW helos? Few...
From personal experiance two dippers are a bit of a nightmare particualry for a conventional submarine with reduced battery endurance (lets face it you don't always get sprung with a fully charged battery). three is no fun at all.
If your were looking at this operating indiviudally this would be true but with ships operating in company then you have the combined resources of the group. Australia used to have dippers with the SK50's but the Seahawk only has buoys. Hopefully the next ASW helo will make goods this deficiency. With all major units having some helo capability and the deck space provided by the LHD there should be more than adequate space to to embark sufficent helicopters to allow two to prosecute a contact.
Depends on the Navy?
For Germany, it's 15 out of 15 frigates. In Greece, 10 out of 14. In France, 9 out of 16. In Australia, 4 out of 12. In the Royal Navy, zero (although the Fort Victoria / Type 23 combination has to be considered there).
In the US Navy, 76 out of 104 cruisers/destroyers/frigates.
Since the ANZAC can take a Seahawk (and carrenty do carry them) I would consider them capable of carryig a decent ASW helo even if it is only a single aircraft.
Of course. The question would be anyway what a "decent" ASW helo is. Seahawk? Merlin? Super Lynx?
Most navies puts their money into 3D ASW anyway. The helo - and the surface ship - is just one element in the overall picture of hunter sub, surface chaser, sweeping helo and searching MPA.
Most navies puts their money into 3D ASW anyway. The helo - and the surface ship - is just one element in the overall picture of hunter sub, surface chaser, sweeping helo and searching MPA.
- not just US waships. Many a modern European and other navy shipdesign employs raft-mounted machinery in sound proofed enclosures.
- Might the USN choice for COGAG have something to do with the size of their ships too (propelling a 9000ton destroyer to 30kn+ may require more power than propelling a ship half that size to the same speed or close to that speed)?
- Both LCS-1 and LCS-2 variants employ a 2× Gas Turbines, 2× Diesel combination.
- French LaFayette and Israeli Saar5 class also employ Prairie-Masker. Italian Guiseppe Gariable CV and Durand de la Penne DDG and Japanese Kongo have it too. The Canadian Halifax used to (the systems were deactivated in 1998 when the Canadian Navy determined that the operating costs of this system outweighed the benefits). To name a few. Russian Udaloy has a Masker-like system for the hull, not nothing like Prairie for the props.
the Type 22 can carry two light lynx's but only one large ASW copter ie Merlin Sea King
http://en.wikipedia.org/wiki/Type_22_frigate
The USN SH-60B and SH-60F are undergoing replacement to the MH-60R which has a dipping sonar (ALFS). Not sure if Australia will aquire the Seahawk Romeo.
Depend on who you talk to and/or which commentator you believe. Some suggest the Romeo is better to Australia in lieu of the Seahawk upgrade and because of risk with not yet mature NH90. Other see NH90 as the way to go as it gives fleet comonality, new airframe design and (anticipated) very capable sensor - weapons fit.
We will wait and see.
Don't discount the role of AORs in this respect: the Dutch Amsterdam/ Spanish Patino class can embarking/supporting 5 Lynx or 3 Sea King. At least in the Dutch navy it used to be the case that for ASW/Escort duty on the atlantic you'ld get a flottilla consisting of an AAW frigate and 2-5 general purpose frigates, an AOR and sometimes an SSK, with the AOR carrying a greater number of the same Lynxes as the frigates.
AN/AQS-22 Airborne Low Frequency Sonar
Raytheon Awarded $63 Million for Airborne Low Frequency Sonar
(Source: Raytheon Co.; issued June 5, 2008)
TEWKSBURY, Mass. --- Raytheon Company has received a $63.4 million U.S. Navy contract for AN/AQS-22 Airborne Low Frequency Sonar, the primary undersea warfare sensor for the U.S. Navy's MH-60R multi-mission helicopter.
AN/AQS-22 provides critical undersea warfare mission support capabilities, including submarine detection, tracking, localization, classification, acoustic intercept, underwater communication, and environmental data collection.
"The award confirms the Navy's commitment to ALFS and the system's contribution to advancing the fleet's undersea warfare capabilities," said Raytheon Integrated Defense Systems' (IDS) Charles "Tom" Bush, vice president of Seapower Capability Systems. "ALFS is a tested and proven asset and the cornerstone of the fleet's anti-submarine warfare operational strategy."
Under the contract, IDS will manufacture, integrate, test and deliver 15 new ALFS systems, as well as provide miscellaneous "weapons replaceable assemblies for unit under test" and air maintenance trainer assets.
Full rate production of AN/AQS-22 has been accelerated since the initial fielding of the MH-60R helicopter into the U.S. Navy fleet in 2006. To date, Raytheon has delivered 16 AN/AQS-22 systems and is currently under contract for 43. This new contract follows two other recent ALFS contracts totaling $89 million to provide spares for whole-life support of deployed systems.
Work will be performed at Raytheon's Seapower Capability Center, Portsmouth, R.I., and by AN/AQS-22 partner, DRS Sonar Systems, Gaithersburg, Md. Work is expected to be completed by January 2011.
Integrated Defense Systems is Raytheon's leader in Joint Battlespace Integration providing affordable, integrated solutions to a broad international and domestic customer base, including the U.S. Missile Defense Agency, the U.S. Armed Forces and the Department of Homeland Security.
Raytheon Company, with 2007 sales of $21.3 billion, is a technology leader specializing in defense, homeland security and other government markets throughout the world. With headquarters in Waltham, Mass., Raytheon employs 72,000 people worldwide.
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Raytheon Awarded $63 Million for Airborne Low Frequency Sonar
(Source: Raytheon Co.; issued June 5, 2008)
TEWKSBURY, Mass. --- Raytheon Company has received a $63.4 million U.S. Navy contract for AN/AQS-22 Airborne Low Frequency Sonar, the primary undersea warfare sensor for the U.S. Navy's MH-60R multi-mission helicopter.
AN/AQS-22 provides critical undersea warfare mission support capabilities, including submarine detection, tracking, localization, classification, acoustic intercept, underwater communication, and environmental data collection.
"The award confirms the Navy's commitment to ALFS and the system's contribution to advancing the fleet's undersea warfare capabilities," said Raytheon Integrated Defense Systems' (IDS) Charles "Tom" Bush, vice president of Seapower Capability Systems. "ALFS is a tested and proven asset and the cornerstone of the fleet's anti-submarine warfare operational strategy."
Under the contract, IDS will manufacture, integrate, test and deliver 15 new ALFS systems, as well as provide miscellaneous "weapons replaceable assemblies for unit under test" and air maintenance trainer assets.
Full rate production of AN/AQS-22 has been accelerated since the initial fielding of the MH-60R helicopter into the U.S. Navy fleet in 2006. To date, Raytheon has delivered 16 AN/AQS-22 systems and is currently under contract for 43. This new contract follows two other recent ALFS contracts totaling $89 million to provide spares for whole-life support of deployed systems.
Work will be performed at Raytheon's Seapower Capability Center, Portsmouth, R.I., and by AN/AQS-22 partner, DRS Sonar Systems, Gaithersburg, Md. Work is expected to be completed by January 2011.
Integrated Defense Systems is Raytheon's leader in Joint Battlespace Integration providing affordable, integrated solutions to a broad international and domestic customer base, including the U.S. Missile Defense Agency, the U.S. Armed Forces and the Department of Homeland Security.
Raytheon Company, with 2007 sales of $21.3 billion, is a technology leader specializing in defense, homeland security and other government markets throughout the world. With headquarters in Waltham, Mass., Raytheon employs 72,000 people worldwide.
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The Fish Hawk systems seems be a good addition. It allows to cut down the reaction time and helps to stay out of the possible SSAM.
I wonder if ASW UAV can take over part of the workload of the S-3. While I don't know the payload of the new 3MDS it would fit a modern UAV made of composite materials very well. Ideally a couple of such (tactical) UAV could search large areas with little downtime.
Finding the Periscope
Periscope Detection Radar - The fundamentals
Periscope persuit
On the other side:
ISRT missions
RWR (radar warning receiver) and MPDF( microwave passive direction finder) are a submarine's friend.
EW warfare
Interesting, but hardly surprising information
Good read-up:
Fundamentals of microwave passive direction finding
Absorbation of the EM waves in water (all states)
There a quite some ways to "test the air" without exposing the periscope and the exact location of the submarine...
Periscope Detection Radar - The fundamentals
Periscope persuit
On the other side:
ISRT missions
RWR (radar warning receiver) and MPDF( microwave passive direction finder) are a submarine's friend.
EW warfare
Interesting, but hardly surprising information
Good read-up:
Fundamentals of microwave passive direction finding
Absorbation of the EM waves in water (all states)
There a quite some ways to "test the air" without exposing the periscope and the exact location of the submarine...