Submarine cloak

[Pilotasso]

Theres a big difference between diesel and siesel/AIP submarines. The US could have chosen among many navies, but went after one of the few with AIP. ;)

[sobek]

That doesn't matter. The relative uncertainties are the same size...

 

As there are more than one possible ways to do the signal processing that surely react different to possible error sources, there might be ways to increase precision.

Edited January 29, 2011 by sobek

[Case]

As there are more than one possible ways to do the signal processing that surely react different to possible error sources, there might be ways to increase precision.

Certainly, I couldn't agree with you more. I am just saying that assuming you know the intrinsic strength of sound signals can have significant uncertainties.

 

That is why I am sure real submarines use various methods to get range, the most obvious one would be some sort of triangulation.

[bumfire]

Sh3 is far better than both of those two combined :P

 

And Dangerous Waters beats them both :)

 

Well, atleast DW has a bearing on what is being spoken about in this thread since its based on submarines instead of uboats.

 

But I do agree that SH3 is the best SH out there, although SH4 isnt that far behind, SH5, i got it int he steam xmas sale for a couple of quid and even though I only spent a couple of quid on it, I still feel I got ripped off.

[Squid_DK]

Most modern submarines (the larger ones not coastal SSK's) carry several somar systems, the US LA class rely heavily upon the BQS-5 Spherical array mounted in the bow and the TB-16 or retrofitted in some boats the TB-23 towed Array, the BQS-5 has both active and passive modes and is a medium frequency system, very capable against surface traffic and can even pick up low flying MPA's the TB-16/23 are both low frequency systems that can only finction in a passive mode, both TA's are capable of acquiring contacts several tens of miles away in normal conditions, if however the boat is in deep blue areas the sound will propagate via convergence zones and that is where you could find a contact far in excess of 100NMI's to set up a torpedo solution you'd basically be listening to a certain contact over timeand then be plotting its bearings, at the same time you'd focus on "him" (Supposing enemy conmtact thus the him being used here) and get a moduklation off his screws and powerplant, stuff like bearings and shaft noise is unique not just to a class of ships or subs but actually to a specific vessel, when you have the rotationspeed of the shaft and the class ID of the vessel you can determine the speed of the vessel and then from the bearings to the target at fixed intervals (30 seconds used often) calculate distance to the target. then you just setup a torpedo run, against a surface target the fish would be set to run deep until it gets to its activation point, then turn shallow to avoid any thermocline in the water, the onboard sonar would (in case of Mk-48 Mod 5/6 ADCAP) then either run in a passive or active mode, in both instances it would relay it's contacts back to the launch platform via 2 way cables it will be reeling pout from a canister in the shrouded propulsor, it carries 10 NMI's of wire and can engage targets out to at least 18 NMI's detonation would be magnetically detonated under the keel of the ship and the 348kg's of HE would break even a carriers keel.

Surface ships can also carry either a towed array or a variable depth SONAR, the earlier being the most effective but also by far the most expensive.

 

Staffan