How Far Is 500 Meters In Feet – Argos advanced 3D navigation sonar searches the seabed and potential navigational hazards anywhere in the water column ahead of the ship. Hazards in the water column are detected as targets in the water and can be detected throughout the sonar range (depending on the size of the target). The maximum detection range for the Argos 350, Argos 500 and Argos 1000 is 350 meters (~1150 feet), 500 meters (~1640 feet) and 1000 meters (~3280 feet) respectively.
While the maximum target detection range in water is a set distance for each product, the maximum down detection range is not. The maximum bottom detection range or bottom mapping range depends on the water depth below the transducer module, not the Argos model.
How Far Is 500 Meters In Feet
At an acute angle, although some energy is deflected forward (green arrow), most is reflected back to the receiver (red arrow)
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At a shallow return angle, most of the energy is reflected forward with very little return to the receiver. This sets the water depth limit.
In shallow water environments, the Argos system can map the seabed in front of the vessel to 8x the water depth below the transducer. This is called the sonar water depth limit. It is the limit on the sonar’s bottom mapping range. An overview of the physics behind these boundaries for mapping the seabed in front of ships is provided in another post. In short, at a shallower angle of return between the seabed and the sonar, less signal is transmitted (more signal is reflected forward).
Beyond this angle, it is difficult for the SonaSoft™ detection algorithm to make clear detections on the seabed. The range where this angle starts to become too shallow ends up being about 8x the water depth.
This covers the maximum range at which underwater and seabed targets can be detected, but what is the maximum bottom mapping depth?
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To cover the entire field of view in front of the ship, the Argos system “sees” from the surface at an angle of about 10° and down towards the seabed at an angle of about 50°. In shallow water, the seabed is close to the sonar, so the transmitted signal has a shorter distance to travel. The transmitted signal goes from the sonar to the seabed and back with little attenuation, so the signal-to-noise ratio is high and the seabed is detected efficiently by SonaSoft™. In general, the shallower the water, the greater the threat to safe navigation. As the water gets deeper, the signal has a longer distance to travel – and as it does, more energy is lost.
Bottom detection with the Argos 500 in about 44 meters (144 feet) of water. The bottom mapping range in this case is greater than 8x the specified water depth (~11x water depth).
Argos’ sonar is designed to avoid obstacles, and so their energy is focused on the upper regions of the water column. designed the system so that the signal is strong enough that, under normal conditions, a mapping range of less than 8x depth is obtained when the depth is less than 50 meters.
When operating in deep water, the signal-to-noise ratio of the seabed is high enough that the seabed is detected at steep angles, but becomes weaker at shallower angles because it has a longer travel distance.
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Of course, although the current system is designed to achieve an 8x depth mapping range in up to 50m of water, at steeper angles the bottom can be detected at depths greater than 50m. The bottom detection depth limit in SonaSoft™ is 85 meters. This limit is introduced mainly for display purposes.
Bottom detection with Argos sonar in ~80 meters (263 feet) of water. The bottom mapping range in this example is about 4.7x deep.
When operating in water deeper than 50 meters, a mapping range below 8x depth may not be achievable. This is because the signal-to-noise ratio is lower with the round-trip distance between the transducer and the seabed, especially at shallow angles. However, bottom detection at steeper angles will be observed up to 85 meters. The bottom range in this regime will typically be less than 8x the depth below the Transducer Module. However, in certain situations with low noise or high signal reflectivity, a mapping range below 8x can be achieved even in deep water environments.
Sonar Cable Advance Program Previous Next Next AIS and ARPA Overlay: Adding situational awareness to sonar data The development is planned to be 500 meters (1,600 feet) tall – taller than most skyscrapers in the world and over 170 km (105 miles) long, but only 200 meters (1/10 mile) wide.
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Imagine a glittering sci-fi style city, surrounded on all sides by mirrored walls, emerging like a giant ribbon from the wild, wild desert on the shores of the Red Sea. That is the view taken by the Saudi Arabian government, and they are happy to execute anyone who disagrees.
The city is called The Line and is the center of Neom, a planned development the size of Belgium in the northwest corner of Saudi Arabia.
According to the beautiful promotional material and inspirational marketing video promoting Neom to potential investors (click the link – the site is really beautiful), the development includes several different elements:
The Line is the heart of Neom and promises a high-tech experience connected to nature with unparalleled quality of life and zero emissions. It is a utopian Tomorrowland with a vertical living atmosphere reminiscent of movies like
Building The City Of Tomorrow By Killing People Today
There’s just one problem: not everyone is on board with the project – especially people who already live in the area the government wants to build it. However, since we are talking about Saudi Arabia, the answer is simple: just kill them.
According to a press release from the Office of the UN High Commissioner for Human Rights, three members of the Howeitat tribe (most famous for their portrayal as fierce but honorable nomadic warriors in the 1962 film
) was arrested, tortured and sentenced to death, while three other members of the tribe received prison sentences ranging from 27 to 50 years. At least one other tribe member was never tried because he was killed by Saudi forces.
If you have the money to splurge on a luxury resort being built, Neom would probably be amazing. Photo by Neom on Unsplash
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What crime did this man commit? They are protesting the forced eviction of their families and the demolition of their homes without compensation. Neom is progress and you can’t stop progress.
For anyone who follows Middle Eastern politics, the hypocrisy of this action is obvious. For decades, Saudi Arabia and other Arab League countries have harshly criticized Israel for expelling Palestinians from their homes to make room for various initiatives. Apparently, when Israel does that, it is an atrocity. When the Government does that, it is not a big deal.
Do you know what this landscape needs? A giant technological behemoth sat in the middle of it. Photo by Neom on Unsplash
Given that some 20,000 people will be forcibly displaced to make way for Neom, one wonders how many disgruntled residents the Saudi government will have to permanently silence to make the prince’s futuristic dream a reality. Furthermore, once the town is finished, it’s anyone’s guess whether it will be a shining example of the post-commuter lifestyle or (contrary to the impression given by the pretty promotional photos) more like a giant prison that controls every aspect of its residents’ lives.
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Will the residents of Neom really be able to leave the city and enjoy the scenery? Photo by Neom on Unsplash
More worrying is the fact that other countries (as well as influential NGOs such as the World Economic Forum) are following Neom’s developments closely and are excited to incorporate “15-minute cities” and similar limited mobility concepts into their urban planning.
If neom Neom’s dream comes true, the experiences of Howeitat tribesmen may provide a sobering glimpse of what we can all expect when the program is rolled out worldwide. This article requires additional citations for verification. Help make this article better by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: “List of highest structures” – news · newspapers · books · academics · JSTOR (January 2012) (Learn how and when to remove this template message)
The tallest structure in the world is the Burj Khalifa skyscraper at 828 m (2,717 ft). Listed are pylons (such as telecommunications poles), self-supporting towers (such as the CN Tower), skyscrapers (such as the Willis Tower), oil rigs, electrical transmission towers and bridge support towers. The list is sorted by absolute height. See List of Tallest Buildings and Structures, List of Tallest Freestanding Structures, and List of Tallest Buildings and List of Tallest Towers for additional information on these types of structures.
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Terminology and listing criteria as defined by the Tall Buildings and Urban Habitat Council. Cable poles are different from towers – the latter do not have support cables or
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