<p>For pressure, you can use something simple like the fact that pressure increases by around 1 atm with each 10 m of water depth. You can also use some very simple <a href="http://www.calctool.org/CALC/other/games/depth_press" rel="nofollow noreferrer">calculators</a> that assume a constant density (not a bad assumption) and gives you the different unit conversion.</p>

<p>For temperature, it varies a fair amount depending on where in the ocean. The average vertical profile for mid-latitudes, looks something like:</p>

<p><img src="https://i.sstatic.net/sObHL.jpg" alt="http://www.windows2universe.org/earth/Water/temp.html"> (<a href="http://www.windows2universe.org/earth/Water/temp.html" rel="nofollow noreferrer">Windows to the Universe</a>).</p>

<p>If you need more detail temperature information for a specific location, you can look into the <a href="https://www.nodc.noaa.gov/OC5/indprod.html" rel="nofollow noreferrer">World Ocean Atlas</a>, which provides observed temperature, salinity (and in some cases other parameters like ph) for the entire world.</p>

<p>My suggestion is that, if you need any specific information, you might ask the people at the <a href="http://www.whoi.edu/main/jason/specifications" rel="nofollow noreferrer">Woods Hole Oceanographic Institution</a> (for instance) that deal with this kind of problem on a regular basis.</p>

CC BY-SA 3.0
2015-05-18T17:20:26.190Z
2015-05-19T15:10:08.293Z
2015-05-19T15:10:08.293Z
arkaia
<p>I have looked at a few do it yourself remotely operated vehicles (ROV), and considered making one myself. However my research on the web has turned up a lot of conflicting information about determining what the temperature and pressure ranges to expect at various depths.</p>

<p>I would like to be able to build something that can go to 4000 meters or even 6000 meters depth. My interest is chiefly in being able to carry illumination and cameras.</p>

<p>Can someone direct me to validated resources of temp pressure and perhaps even pH conditions. Has anyone ever heard of using fused silica cylinders to hold camera/lighting/battery packs for an ocean going ROV?</p>

CC BY-SA 3.0
2015-05-18T18:30:28.050Z
What reasonable resource gives conflicting info about T and P at depth. These are fairly straight forward with small uncertainty at the extreme depths you want.
mankoff
CC BY-SA 3.0
2015-05-18T18:31:29.817Z
You can't do 4000 or 6000 m as DIY, unless you have a large budget and manufacturing facilities.
mankoff
<ocean><oceanography>
What are the temperature and pressure conditions an ROV design would have to deal with to descend to 4000m?
steverino
# What are the temperature and pressure conditions an ROV design would have to deal with to descend to 4000m?

(Asked by: username_0 on 2015-05-18)

I have looked at a few do it yourself remotely operated vehicles (ROV), and considered making one myself. However my research on the web has turned up a lot of conflicting information about determining what the temperature and pressure ranges to expect at various depths.

I would like to be able to build something that can go to 4000 meters or even 6000 meters depth. My interest is chiefly in being able to carry illumination and cameras.

Can someone direct me to validated resources of temp pressure and perhaps even pH conditions. Has anyone ever heard of using fused silica cylinders to hold camera/lighting/battery packs for an ocean going ROV?

**Tags:** ocean, oceanography

> **Comments:**
> **username_1**: What reasonable resource gives conflicting info about T and P at depth. These are fairly straight forward with small uncertainty at the extreme depths you want.  
> **username_1**: You can't do 4000 or 6000 m as DIY, unless you have a large budget and manufacturing facilities.  

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## 1 answers

### Answer by username_2 on 2015-05-18. Score: 6

For pressure, you can use something simple like the fact that pressure increases by around 1 atm with each 10 m of water depth. You can also use some very simple [calculators](http://www.calctool.org/CALC/other/games/depth_press) that assume a constant density (not a bad assumption) and gives you the different unit conversion.

For temperature, it varies a fair amount depending on where in the ocean. The average vertical profile for mid-latitudes, looks something like:

![http://www.windows2universe.org/earth/Water/temp.html](https://i.sstatic.net/sObHL.jpg) ([Windows to the Universe](http://www.windows2universe.org/earth/Water/temp.html)).

If you need more detail temperature information for a specific location, you can look into the [World Ocean Atlas](https://www.nodc.noaa.gov/OC5/indprod.html), which provides observed temperature, salinity (and in some cases other parameters like ph) for the entire world.

My suggestion is that, if you need any specific information, you might ask the people at the [Woods Hole Oceanographic Institution](http://www.whoi.edu/main/jason/specifications) (for instance) that deal with this kind of problem on a regular basis.


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