Some basic questions about enemy visible and radar range distances

[mobucks]

Don't forget that the crew level (rookie to elite) and the crew state (alerted or non) has a lot to do with how well they can find you.

I have during my current patrol a small !TASK FORCE! of two armed merchant cruisers (the troopship) and these pigs must be elites, since during the past 5 attempts to sink even one of these suckers at night in perfect conditions (for me) they always end up spotting me; last time I tried to fire from the hip at one and the other rams by boat killing it instantly. (I was at PD on a moonless night)

This is the same career/same mods where just last patrol I was able to con my boat on the surface at 12kts willy nilly through a large troop convoy in even less favorable conditions. We're talking passing ships 100m astern, with his buddy behind him staring right at me.

[maillemaker]

On the contrary, the echolot (the device used for measuring the depth under the keel), will give up u-boat's position in any enemy naval unit is in range.

This is different from SH3 then.

Steve

[MCM]

Great, thank you all very much for your answers. Yes I meant how deep do you have to dive to escape from ASDIC. But I think this will change with the years and I have to dive deeper and deeper.

But good point with the measuring the depth: Will this always be heard of the destroyers when in range or only when they are alertet? And how far is the range? Sure I can find it out slowly ingame but a rough estimate again is always helpful

[Aktungbby]

But good point with the measuring the depth: Will this always be heard of the destroyers when in range or only when they are alertet? And how far is the range? Sure I can find it out slowly ingame but a rough estimate again is always helpful

Some useful info here: http://jproc.ca/sari/asd_et1.html Bottom line: the effective range is 2000 yards BUT the ASDIC's individual operator is the judge of how deep you are..' "A smart submarine commander, with a lot a nerve, would head into the area of the depth charge explosions. He knew, that within this area, nothing could be identified on Asdic for five to ten minutes, especially if the charges had been rigged for detonation at 250 to 500 feet. A safe shelter could be had even if it was only temporary." "While in convoy, operators used Asdic to listen to the engines and propellers of other ships which was very helpful during fog conditions or on nights when everything was pitch black. To say that convoys were well protected by Asdic would be an understatement especially in the early years of the war. Typically, a convoy consisting of 30 to 50 merchant ships created a perimeter distance of 16 to 18 miles. In theory, the escorts were positioned so that their Asdic beams overlapped, providing unbroken coverage of the convoy perimeter. The reality of the situation was different. An escort group usually consisted of one destroyer and three of four corvettes, barely enough to provide proper coverage especially with Asdic whose range limits averaged around 2000 yards under normal conditions. When convoys did have sufficient escorts, not all the Asdic sets were used simultaneously. If two ships were operating in the same area and on the same frequency, there were two options. The primary option would mean shutting down one of the Asdics." IN short: as with the radar that the battleship Bismarck's commander famously and erroneously assumed was giving away his position because it was audible TO HIM but not being received back accurately by the transmitting vessel, Sonar is dependent on the vagaries of water and background sounds, tidal rips and temperature gradients, and the operator may not be receiving an accurate reverberation of the signal 'bounceback' You, in the sub, can (always) hear his sonar; but that doesn't mean the enemy operator (the HSD) is receiving or 'interpreting' his signal correctly especially with a type 123 or 123A asdic sets as on most corvettes for example. Whether the SHV/III games reflects a particular type of ASDIC equipment or the vagaries of a sonar operator and/or water and previous depth charge disruption in the game is unknown to me.

[THE_MASK]

Originally Posted by mobucks

Don't forget that the crew level (rookie to elite) and the crew state (alerted or non) has a lot to do with how well they can find you.

I have during my current patrol a small !TASK FORCE! of two armed merchant cruisers (the troopship) and these pigs must be elites, since during the past 5 attempts to sink even one of these suckers at night in perfect conditions (for me) they always end up spotting me; last time I tried to fire from the hip at one and the other rams by boat killing it instantly. (I was at PD on a moonless night)

This is the same career/same mods where just last patrol I was able to con my boat on the surface at 12kts willy nilly through a large troop convoy in even less favorable conditions. We're talking passing ships 100m astern, with his buddy behind him staring right at me.

Yep , totally unpredictable from one contact to the next . The beauty of SH5 . Also crew fatigue with mods .

[MCM]

Perfect informations, thank you all... one question left: How far can a DD hear me if I ping the depth under kiel/uboot? What are your experiences?

THX everybody