# How far can radio waves travel underwater?

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Date created: Sat, Aug 14, 2021 9:04 PM
Date updated: Sat, May 21, 2022 6:25 PM

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## Top best answers to the question «How far can radio waves travel underwater»

Very low frequency (VLF) radio waves can penetrate seawater a few hundred feet (10–40 meters), and many navies use powerful shore VLF transmitters for submarine communications.

#### Why can't radio waves travel through sea water?

• What limits transmission is conduction, and sea water is very conductive, and largely, in the case of sea water, absorption. Together they they severely limit high frequency (short wavelength) transmissions; however, low frequency (long wavelength) radio does travel through a little better.

FAQ

Those who are looking for an answer to the question «How far can radio waves travel underwater?» often ask the following questions:

### 🌊 Do radio waves work underwater?

• But radio signals don't work underwater, so the established radio communication standards are useless. Instead, underwater signals are sent via acoustic waves, but until recently there was no standard for which frequencies to use. That's all been changed now, thanks to a new standard being pioneered by NATO.

### 🌊 Why don radio waves work underwater?

#### Why can't radio waves travel through sea water?

• What limits transmission is conduction, and sea water is very conductive, and largely, in the case of sea water, absorption. Together they they severely limit high frequency (short wavelength) transmissions; however, low frequency (long wavelength) radio does travel through a little better.

### 🌊 How do underwater sound waves travel underwater?

• A sound wave propagating underwater consists of alternating compressions and rarefactions of the water. These compressions and rarefactions are detected by a receiver, such as the human ear or a hydrophone, as changes in pressure.

We've handpicked 21 related questions for you, similar to «How far can radio waves travel underwater?» so you can surely find the answer!

Can bullets travel underwater?

Typical bullets can travel just a few feet through the water before they're slowed to a stop. CAV-X bullets can reportedly travel 60 meters underwater, and can go through 2 centimeters of steel fired from 17 meters away, indicating that it could even be used to penetrate submarines.

Can sond travel underwater?

#### Where does sound come from when you are underwater?

• Our head itself is full of tissues that contain water and can transmit sound waves when we are underwater. When this happens, the vibrations bypass the eardrum, the part of the ear that evolved to pick up sound waves in the air. Sound also interacts with boundaries between two different mediums, such as the surface of water.
Does eurostar travel underwater?

#### How long are under water on the Eurostar?

• The tunnel is 31 miles long, with 23 of those miles beneath the surface of the water, traveling at an average depth of 150 feet below the seabed. The Eurostar passenger train is not only the quickest journey across the Chunnel, but it also has faster access and loading times.
Does sound travel underwater?

Yes sound travels through water.

How do radio signals trave underwater?
• An underwater transmitter uses an acoustic speaker pointed upward to the surface. The transmitter sends multichannel sound signals, which travel as pressure waves. When these waves hit the surface, they cause tiny vibrations. Above the water, a radar, in the 300 GHz range, continuously bounces a radio signal off the water surface.
How are radio waves used to communicate with a submarine?
• A few nations have built transmitters which use extremely low frequency (ELF) radio waves, which can penetrate seawater to reach submarines at operating depths, but these require huge antennas. Other techniques that have been used include sonar and blue lasers .
Do sound waves effect underwater animals?

#### Why are sound waves dangerous to marine animals?

• Marine animals depend on their hearing to navigate, communicate and catch prey. But sound levels in the oceans are rising constantly. Military sonar used to locate submarines is particularly dangerous, as its sound waves can interfere with hearing within a radius of about 3,000 kilometres.
How often do underwater waves occur?
• Underwater waves are pretty common, but they occur more frequently in some parts of the world than others. In the notoriously turbulent Lombok Strait, these powerful waves occur almost every two weeks.
How to make pressure waves underwater?

#### How does the underwater pressure calculator work?

• Underwater Pressure (p): The calculator returns the pressure in pascals (Pa). However, this can be automatically converted to other pressure units via the pull-down menu. d is the depth in the water or the height of the column of water above one.
How to paint underwater light waves?

#### Painting Light Filtering Through Water

1. Paint the water a dark blue on your canvas…
2. Paint two or three straight (not parallel) lines of light, angled toward the same source so they create a rough V shape…
3. Blend the light rays into the blue water with a flat, dry paintbrush.
Why can't you feel waves underwater?

Of course the water underneath the surface is moving too. This means that submarines cross storms by doing what they do best – sailing completely submerged. The deal is that the deeper you go, the less you can feel the waves. It is because waves are basically a bunch of water molecules rolling over each other.

Can gps signals travel underwater?

No. The GPS signal is high-frequency radio waves. High frequency radio waves cannot travel through water.

Can sound travel faster underwater?

Sound waves travel faster in denser substances because neighboring particles will more easily bump into one another. Take water, for example. There are about 800 times more particles in a bottle of water than there are in the same bottle filled with air. Thus sound waves travel much faster in water than they do in air.

Does sound travel farther underwater?

Sound waves travel faster in denser substances because neighboring particles will more easily bump into one another… Thus sound waves travel much faster in water than they do in air. In freshwater at room temperature, for example, sound travels about 4.3 times faster than it does in air at the same temperature.

Does sound travel faster underwater?

Sound waves travel faster in denser substances because neighboring particles will more easily bump into one another… Thus sound waves travel much faster in water than they do in air. In freshwater at room temperature, for example, sound travels about 4.3 times faster than it does in air at the same temperature.

How does sound travel underwater?

When underwater objects vibrate, they create sound-pressure waves that alternately compress and decompress the water molecules as the sound wave travels through the sea. Sound waves radiate in all directions away from the source like ripples on the surface of a pond.

How far bullet travel underwater?

#### Does water slow down bullets?

• Hiding underwater can stop bullets from hitting you. partly confirmed. All supersonic bullets (up to .50-caliber) disintegrated in less than 3 feet (90 cm) of water, but slower velocity bullets, like pistol rounds, need up to 8 feet (2.4 m) of water to slow to non-lethal speeds.
How far sound travel underwater?

Sound travels about 1500 meters per second in seawater. That's approximately 15 soccer fields end-to-end in one second. Sound travels much more slowly in air, at about 340 meters per second, only 3 soccer fields a second.

Why can jeeps travel underwater?

Just like humans use snorkels to breathe underwater, a snorkel on a Jeep supplies the engine with air when under water… So as long as a Jeep is fitted with a snorkel that is big enough to feed the engine with enough air, the Jeep can be submerged in water.

How do underwater drones send radio signals?
• These submarine drones are challenging to send radio signals to. They can be autonomous, using their onboard sensors to function. Another method is a long tether that allows for a direct connection between ship and drone. An underwater drone works by controlling its buoyancy so that it doesn’t sink.
What is the frequency range of radio waves used in submarines?
• Very low frequency. VLF radio waves (3–30 kHz) can penetrate seawater to a depth of approximately 20 meters. Hence a submarine at shallow depth can use these frequencies. A vessel more deeply submerged might use a buoy equipped with an antenna on a long cable.