Potential Guide
 

How to avoid Sonar Detection?

Anyone wanna man up to putting out a guide for that incase say, you get caught inbetween a convoy and you do an emergancy dive and do one of those follow the leader manuvers to hide from their sonars? I was wondering if people have a step by step guide on how to escape sonar detection.

I don't know of a guide, but it's discussed a lot. There are basics

Keep a narrow profile, most important if it's pinging.

Find a thermal layer.

Run Silent, even if you adjust speed.

I dive as deep as I can. You can go much deeper than default. I don't get into depths as mods play with them, but overall another 100 never hurt.

Know the weather. If winds are high, you can get by with a lot more.

You can do a search on escaping dd's. Everyone has their own methods.

What thermal layer? I've never heard that. :06:

You've never heard "passing thermal layer" from the crew? That verbal cue is the only indication you get that they are there.

A change in the temperature profile of the water with depth. This temperature (but also pressure and salinity has this effect) changes the speed of sound in the water. Lower temperature means lower speed of sound. A changing speed of sound with increasing depth curves the sound upwards or downwards towards the slower speed of sound.

A layer is formed where this sound speed has a maximum, or a minimum or just changes significantly. In layers where the soundspeed has a maximum the sounds above the layer are curved back upwards, and below the layer curved downwards. This makes your submarine below the layer less likely to be heard by a surface vessel. Though some sounds are emitted so steeply upwards that they do penetrate it. But only hearable at close ranges.

If there is a layer with a minimum sound speed the sounds get curved back towards this depth. This is known as a soundchannel and makes sounds travel very far. But that happends at rather deep depths, and more interesting to modern submarines.

It is also possible that the speed of sound slightly increases just below the surface. This makes the soundwave reflect downwards but is bended back upwards again as it travels forward. This also make the sounds near the surface to trafel fairly far.

You might want to search the Dangerous Waters/Subcommand forum for more information and links to community written ebooks about this.A guy named DrSid even made a small simulation program for it. Showing really cool wave paterns. But as a quick link forthose ebooks, www.subguru.com usually has it all.

Keep it simple dont be the Sirens to the IJN sailors.
Or do what Armistead and Pisces say.

Almost everyone has a different method of avoiding or evading(escapeing) sonar detection that a simple guide would not do the subject justice.

Very true as well you can use the basics of anyone persons system but in the end each skipper developes thier own methods. Mine for example are based on what the hunter is capiable off not basing it on what I think his intent is I could be wrong however if basing your moves on what the given pursuers ability(ie ship stats) is that I can know.In a way it takes some time to learn how to evade. I had one method that worked 50% of the time that was based on judging intenet then i read O'Kanes book on the Wahoo and learned that "Mush" and O'Kane both based thier offence/defence on the enemy capabilites not thier precived intent and I started making my primary goal if submerged to get as far away from the DDs possiable sensor range from the outset if you can do that who cares his intent?And with how good the AI is TMO you realy do want to get as far away as you can.

Do you know there are two depth gauges? I didn't know about it until someone mentioned it in passing.

Click the tab just below the big round depth gauge and it will change to a deeper one... go to a depth of 220 feet... at some point your XO should announce - passing thermal layer.

Good luck and happy hunting!

You must diving to pass a thermal layer and be at normal speed to not miss the annoucement a good method is to dive at dawn each day dive all the way until you find the layer it is safe to say that the layer will be at about that same level in the area you cover over the next 24 hours and you will at least have a rough idea how deep you will need to go to hit it.Though you want to pass below it to get the advantage it offers.