US Navy experienced radar detecting submarine periscopes

The US Navy has tested the submarine periscope detection system, which is part of the new AN / SPQ-9B shipborne radar, reports Popular Mechanics with reference to the resource Defense Aerospace.

Mast, antenna and periscope of a Virginia submarine

Testing of the system was carried out from the board of the cruiser "Lake Champlain".

“The new radar system is capable of detecting submarine periscopes at a considerable distance. At the same time, the discrimination algorithm allows ignoring foreign objects floating on the sea surface, or interference and reflections from the sea surface ”, - said in a statement. Detection range is not specified.

It is reported that "AN / SPQ-9B is an upgraded version of the base radar AN / SPQ-9A, today standing on destroyers of the type" Sryuens "and" Arly Burk ", Ticonderox type cruisers and aircraft carriers of the type" Nimitz ". The basic version of the radar to detect periscopes is not capable.

The resource notes that the system “cannot be used to search for submerged submarines, since water is not permeable to electromagnetic radiation from the radar spectrum.”

These systems have been developed in the USA since the 1970s. The equipment used today is capable of detecting periscopes at a distance of 9,3 km.

Comments

[gray smeet]

quote:
These systems have been developed in the USA since the 1970s. The equipment used today is capable of detecting periscopes at a distance of 9,3 km.

Are the specialists of the moreman - 9,3 km - is this a sufficient range for a torpedo attack of a submarine on a ship?

Sorry amateur, for a possibly dumb question ..

[Lord of the Sith]

20, 40 and 70 km range of modern torpedoes.

[Ruslan]

question from the amateur. but interestingly, are periscopes now generally needed? how they were used before, is it still relevant? as I understand it, according to the data of sonars, sonars, they are able to distinguish the sounds of ships like they know. where to aim now through the periscope? or just brazenly staring through it at the aircraft carrier, breaking into the Amer warrant? :))

[St Petrov]

to look at the fruits of their labors after the release of the torpedo is a holy thing.

[sir_obs]

The attack of a surface ship is optimal at a distance of 35-45 kabeltovyh, that is, 3-4 nautical miles

Before sticking out the periscope, the boat lifts a station that detects any radiation from enemy radars. If it is present, then dives again. Yes, and periskov is not particularly needed for an attack, you can shoot according to the SAC in passive mode. Nothing sophisticated.
The main thing is to accurately determine the distance to the target. This can be done by various methods without emitting a signal. Before the attack, you can perform a dolphin jump, the radar is turned on for the enemy in underwater position, the boat goes to the periscope depth and immediately goes down,
As soon as the radar antenna is shown above the water, an impulse is given per revolution of the antenna. At this moment, simply mark the points of the orler, which
You attack and the distance to the target is adjusted.
The probability of detection is small, but the exact distance for shooting. Of course, all this goes well when the CBD is well trained.

[gray smeet]

Quote: sir_obs

The attack of a surface ship is optimal at a distance of 35-45 kabeltovyh, that is, 3-4 nautical miles

Before sticking out the periscope, the boat lifts a station that detects any radiation from enemy radars. If it is present, then dives again. Yes, and periskov is not particularly needed for an attack, you can shoot according to the SAC in passive mode. Nothing sophisticated.
The main thing is to accurately determine the distance to the target. This can be done by various methods without emitting a signal. Before the attack, you can perform a dolphin jump, the radar is turned on for the enemy in underwater position, the boat goes to the periscope depth and immediately goes down,
As soon as the radar antenna is shown above the water, an impulse is given per revolution of the antenna. At this moment, simply mark the points of the orler, which
You attack and the distance to the target is adjusted.
The probability of detection is small, but the exact distance for shooting. Of course, all this goes well when the CBD is well trained.

Thank you, it's nice to read a qualified answer. And not hypotheses and stinging remarks, especially if there is nothing to say. (I didn’t want to offend anyone)!

[Alex777]

It seems to me that Americans are very worried about NPL / DEPL.
So they can’t detect, so at least they hope to notice the periscope / snorkel ...)))

[field engineer]

This stray is especially for fishermen. Look for floats on a long cast.

[iliitchitch]

I am laughing just, 9.3 km (!), Well, I discovered the periscope, exactly at that moment, you’ll dock at 533mm in the well. Is it their aggravation before the adoption of the military budget, a progress report?

[PKK]

Hurray! Invented in 1942, a radar against Dönitz submarines has finally passed the test. Next news, Yankee landing on the moon!

[bulvas]

These systems have been developed in the USA since the 1970s. The equipment used today is capable of detecting periscopes at a distance of 9,3 km.

Quote: gray smeet

Are the specialists of the moreman - 9,3 km - is this a sufficient range for a torpedo attack of a submarine on a ship?

Quote: iliitch

I am laughing just, 9.3 km (!), Well, I discovered the periscope, exactly at that moment, you’ll dock at 533mm in the well. Is it their aggravation before the adoption of the military budget, a progress report?

I wonder how many years have passed since when it was necessary to make out the enemy through the periscope for a torpedo attack?

Or do you still have to attack the old fashioned way, make out and set the target in silhouette?

Or is it again a means to combat submarines of the countries of the 3rd world?

[Vasya_Piterskiy]

I wonder how many years have passed since when it was necessary to make out the enemy through the periscope for a torpedo attack?

Or do you still have to attack the old fashioned way, make out and set the target in silhouette?

I remembered that there used to be a slot machine called "sea battle". I immediately had an association with him!

[iliitchitch]

Quote: bulvas

I wonder how many years have passed since when it was necessary to make out the enemy through the periscope for a torpedo attack?

Or do you still have to attack the old fashioned way, make out and set the target in silhouette?

Pleasure to get, why not? North Koreans will not refuse, I think.

[Sagittarius YaNAO]

Or is it again a means to combat submarines of the countries of the 3rd world?
It’s they who will fight with the igil, because for them he will be long.

[FenH]

Quote: PKK

Hurray! Invented in 1942, a radar against Dönitz submarines has finally passed the test. Next news, Yankee landing on the moon!

This type of budget has been mastered, we need new type development-The new radar will now not only be able to detect the periscope 15 miles away, but also send an image of a bare ass to it to unnerve the enemy’s submarines. The development cost will not exceed $ 1 billion

[Same lech]

AN / SPQ-9 (fr. Spook nine) is an American multi-purpose radar for surface surveillance and weapon control, used in the Mk-86 artillery fire control system. Provides the determination of two target coordinates - range and azimuth. Able to detect low flying (up to 600 m) air targets. Provides a tracking mode during review (TWS).
Testing of the prototype was carried out on the test ship AVM-1 Norton Sound. Serial samples are installed destroyers type "Spruence" and ships of other types.

AN / SPQ-9B
Modification with double detection range and improved range resolution. Replaced the AN / SPQ-9A modification on cruisers of the Ticonderoga type as part of the Cruisers Modernization program, aimed at extending the life of existing ships. The AN / SPQ-9B radar is part of the Mk-160 artillery fire control system.

A little more about this ...

[Abbra]

Our UGST in the 1980 year beat on 50 km and more ...

[Averias]

Quote: Abbra

Our UGST back in 1980

From the language "removed". Also puzzled by this news.

[mav1971]

And the submarine’s fire control system at what distance could make passive target capture sufficient for target designation of a torpedo fire control system?

Example. PM bullet flight range - 700 meters.
Sighting - 25 meters.
The real applicability of the pistol in combat conditions (take our bandit showdowns and police shooting in the States) is up to 6 meters.

Can you calculate the difference yourself?

Stop then putting nonsense on the tongue?

[mav1971]

Quote: Abbra

Our UGST in the 1980 year beat on 50 km and more ...

And the submarine’s fire control system at what distance could make passive target capture sufficient for target designation of a torpedo fire control system?

Answer this question for yourself - you will stop looking like a fool ...

[krops777]

And if the periscope will be made of carbon fiber or covered with it then how?

[Vasya_Piterskiy]

And if the periscope will be made of carbon fiber or covered with it then how?

Then we need 100mln dollars for a new development!)))

[krops777]

Then we need 100mln dollars for a new development!)))

Well, they know how, expensive, beautiful and useless.

[iliya87]

Of course, I am not a submariner, but vaguely imagine the attack of a modern submarine from the position of periscope depth. Especially from a distance of 5-9 km. If only the diesel engine at the same time old and Japanese cameo on board.

[AdekvatNICK]

Dima is burning)))))

[SklochPensioner]

Amateur question to the Americans: And why are you still fighting with periscopes ?!

[the polar]

Aha ha !!! Until now, the watchman, armed with marine binoculars, to cope with the submarine within the line of sight, has dealt with this task for the standard salary. And by the way, there is a watch of hydroacoustic ...

[Wedmak]

Damn, you have to do a stealth periscope. )))) In general, 9 km ... well, it's like a submarine will look into your porthole. Through the periscope. )))) The sense, in general, is a little from such a radar.

[VP]

And what for the boat to pull out the periscope 9 km from the ticonderoga?
For 9 km, the boat will paint the whole situation without a periscope.

[Mountain shooter]

They will change the shape of the radar, cover it with radar absorbing material, and the range will decrease sharply. As soon as a weapon appears - protection begins to improve ...

[Dwarfik]

Washing in full swing!

[VALERIK_097]

What do you grab onto the periscope, besides it on the ship there are still a lot of retractable devices for various purposes, but not a single commander who is sensible in his mind will ever use them at such a distance from the enemy.

[screw cutter]

I expect from our asymmetric response in the form of metal floats with a small mirror on top of two meters above the water, scattered in large numbers from aircraft in the area of ​​potential partners.

[VALERIK_097]

Why is it so expensive and difficult - we fill a quarter of a bottle of champagne, plug it with a cork, stick a stainless steel fork and let it go freely.

[shinobi]

I, this, deeply apologize to the members of the forum, but radars detecting periscopes of boats have been used since 1943 of the last century. The first prototypes were installed on seaplanes of the Catalina series. With automatic detonation in depth on anti-submarine bombs. This is a classic of anti-submarine warfare, German and Japanese submarines were extinguished by them .This news is more than 70 years. The zone of the ship's radar is limited only by the visibility of a straight line of the horizon. Maybe I'm not catching up with something? Enlighten the wretched.

PS: A modern ship’s radar of a 1980 production model with a phased antenna is capable of viewing an object the size of a tennis ball in 3D resolution in the line of sight. What are they holding the whole world for?

[gregor6549]

The AN / APS-116 radar providing the ability to detect periscopes of submarines was developed in the USA at the beginning of the 70x and was installed on S-3 Viking carrier-based anti-submarine aircraft as well as on the P3 Orion. For those who are interested in details http://www.jhuapl.edu/techdigest/TD/td1801/ousbourn.pdf
So the news is somewhat dilapidated.

[gregor6549]

And here is a sample of the modern radar company Raytheon used on an anti-submarine aircraft Poseidon. Among his tasks, among other things, is the task of detecting the periscopes of submarines http://sei.ckcest.cn/product_img/360001/8385/531672/Document/rtn_sas_ds_anapy10.
pdf