Penetrating convoy screens, and one bug/technical question

andqui · 01-06-16, 04:25 PM

1) I'm having the wind/wave sound bug where it continually loops, even while submerged or in calm weather, occuring after I alt+tab. Most of the references to this known bug I can find are from several years ago- is there a known fix for it nowadays?

2) I need help getting past convoy escorts (NYGM). I'm having an issue with escort vessels seemingly detecting me magically when I try to approach submerged under the convoy screen. I'm guessing that they are constantly pinging for contacts while making their sweeps, so I should try to avoid passing near them or at too shallow a depth.

However, there have been several times where I have made my approach, not heard any pings, only to find the convoy alerted and buzzing with activity even before I raise my scope. How on earth do they detect me? I'm not going very fast under water, and besides hydrophone ability should be reduced with them constantly moving around at 7-10 knots up there.

thanks

GoldenRivet · 01-06-16, 07:37 PM

Quote:

Originally Posted by andqui

1) I'm having the wind/wave sound bug where it continually loops, even while submerged or in calm weather, occuring after I alt+tab. Most of the references to this known bug I can find are from several years ago- is there a known fix for it nowadays?

Im not aware of any mod or patch that addresses this, however if you save and exit the game (surfaced of course) i seem to recall this corrects the issue when you re-load

Quote:

Originally Posted by andqui

2) I need help getting past convoy escorts (NYGM). I'm having an issue with escort vessels seemingly detecting me magically when I try to approach submerged under the convoy screen. I'm guessing that they are constantly pinging for contacts while making their sweeps, so I should try to avoid passing near them or at too shallow a depth.

However, there have been several times where I have made my approach, not heard any pings, only to find the convoy alerted and buzzing with activity even before I raise my scope. How on earth do they detect me? I'm not going very fast under water, and besides hydrophone ability should be reduced with them constantly moving around at 7-10 knots up there.

thanks

irregardless of the mod used, convoy escorts are either listening passively, or listening actively

in passive listening, the destroyer creeps at slow speed listening for the sound of your propeller beats on his hydrophone. You should not get close to or attempt to go under the convoy escorts as even at ahead slow with silent running set, at short enough range the escorts WILL hear you, depending on the year and skill level i wouldnt get within 1,000 meters of an escort if possible.

another technique is to click the small button by your speed telegraph which switches it to the speed dial, there you can order a speed of 1 knot, this reduces RPM to 50 and makes the sub much quieter. however, if you are close enough to the escort, he will probably hear you with hydrophones.

andqui · 01-06-16, 07:59 PM

Quote:

Originally Posted by GoldenRivet

in passive listening, the destroyer creeps at slow speed listening for the sound of your propeller beats on his hydrophone. You should not get close to or attempt to go under the convoy escorts as even at ahead slow with silent running set, at short enough range the escorts WILL hear you, depending on the year and skill level i wouldnt get within 1,000 meters of an escort if possible.

another technique is to click the small button by your speed telegraph which switches it to the speed dial, there you can order a speed of 1 knot, this reduces RPM to 50 and makes the sub much quieter. however, if you are close enough to the escort, he will probably hear you with hydrophones.

Any good techniques for getting the diagonal right between the front and side escorts?

GoldenRivet · 01-06-16, 08:12 PM

I try to get a few miles out ahead of the convoy where the lead escort and first column are barely visible through the scope and steer directly toward them.

as they approach i can plot the position of the outer most rows on the map screen after a few sightings I can plot their course on the map screen using the ruler tool... I try to plot the course of the outermost rows of merchants. once i have a good idea about where the outermost rows will be I can adjust my course left or right as needed to end up in the sweet spot about 500-1000 meters off their beam.

I use GWX, not sure about NYGM but in GWX the flank escorts will break off on a search pattern every few minutes, this creates a good opportunity to maneuver into the convoy's 10 and 2 o'clock positions about 45 degrees off either side. just be sure to give the lead escort a wide berth.

another option - works the same way, but with a little more patience you can find yourself inside the lanes instead of just outside them, you just have to wait for that lead escort to pass by.

the approach can also be made at night on the surface in early war years. the pro to a surfaced approach is - enemy hydrophones cannot hear other surfaced vessels so they HAVE to spot you visually which is difficult especially if you control your temptation to rush in at high speed. most attacks in 1939-lat 1941 were made from the surface

the con to surface approach... you are not invisible to the naked eye and can be spotted and will then have to pull the plug and crash dive thereby spoiling any chance of attack but the destroyers will have a rough time seeing your little boat. additionally, in late war the escorts have radar so you have about a 95% chance of being detected and the surface approach is impossible unless radar hasnt come out yet

RConch · 01-07-16, 08:51 AM

When you go in on the surface, set your depth for 7 meters and go in at 1/3 or standard speed. Only your tower is exposed.

GT182 · 01-07-16, 02:41 PM

If you get in front of a convoy just run at silent running or sit and wait at all stop. Escorts won't even know you're there..... unless they run over you.

Then you can let them pass and pick out the juicy targets like the tankers and big cargo ships. I wait until I'm inside the convoy and them wreak havoc. The escorts will have no idea where you are until you thin the heard. Then pick them off one by one.

One trick I've used is to lie and wait under a ship that's dead in the water and not sinking. The escorts will circle and eventually give up and leave seeing they can't depth charge you.

Obltn Strand · 01-09-16, 07:34 AM

Quote:

Originally Posted by Rconch

When you go in on the surface, set your depth for 7 meters and go in at 1/3 or standard speed. Only your tower is exposed.

Doesn't work in NYGM. It only cuts down speed and also diving time...nothing else. Keep your profile small, set speed to 1/3 and never go closer than 2000m...

sublynx · 05-23-16, 10:57 PM

Quote:

Originally Posted by andqui

Any good techniques for getting the diagonal right between the front and side escorts?

US Navy maneuvering board manual from 1941 has some exercises that can be used but he problem is that the escorts are not keeping a steady course. You would either need to plot the escorts for a long time to figure out the pattern or just take an educated guess on the right course and adjust according to the situation.

Aquelarrefox · 05-26-16, 05:44 AM

hey hey, does the radar detection of periscopes is intantaneous when periscope rised at 4000m? Even with 25 seconds rised it?

i think radar should work worst in short ranges.

wich mod should be recomended to twick how radar works as many have been done to fix viasual sensors?
something like this: http://www.subsim.com/radioroom/show...9&postcount=33
some experience with it? theres a torpedo range correction too.

01-06-16, 04:25 PM	#1
andqui Soundman Join Date: Sep 2007 Posts: 149 Downloads: 195 Uploads: 0	Penetrating convoy screens, and one bug/technical question 1) I'm having the wind/wave sound bug where it continually loops, even while submerged or in calm weather, occuring after I alt+tab. Most of the references to this known bug I can find are from several years ago- is there a known fix for it nowadays? 2) I need help getting past convoy escorts (NYGM). I'm having an issue with escort vessels seemingly detecting me magically when I try to approach submerged under the convoy screen. I'm guessing that they are constantly pinging for contacts while making their sweeps, so I should try to avoid passing near them or at too shallow a depth. However, there have been several times where I have made my approach, not heard any pings, only to find the convoy alerted and buzzing with activity even before I raise my scope. How on earth do they detect me? I'm not going very fast under water, and besides hydrophone ability should be reduced with them constantly moving around at 7-10 knots up there. thanks

01-06-16, 08:12 PM	#4
GoldenRivet Subsim Aviator Join Date: Mar 2007 Location: Texas Posts: 8,726 Downloads: 146 Uploads: 0	I try to get a few miles out ahead of the convoy where the lead escort and first column are barely visible through the scope and steer directly toward them. as they approach i can plot the position of the outer most rows on the map screen after a few sightings I can plot their course on the map screen using the ruler tool... I try to plot the course of the outermost rows of merchants. once i have a good idea about where the outermost rows will be I can adjust my course left or right as needed to end up in the sweet spot about 500-1000 meters off their beam. I use GWX, not sure about NYGM but in GWX the flank escorts will break off on a search pattern every few minutes, this creates a good opportunity to maneuver into the convoy's 10 and 2 o'clock positions about 45 degrees off either side. just be sure to give the lead escort a wide berth. another option - works the same way, but with a little more patience you can find yourself inside the lanes instead of just outside them, you just have to wait for that lead escort to pass by. the approach can also be made at night on the surface in early war years. the pro to a surfaced approach is - enemy hydrophones cannot hear other surfaced vessels so they HAVE to spot you visually which is difficult especially if you control your temptation to rush in at high speed. most attacks in 1939-lat 1941 were made from the surface the con to surface approach... you are not invisible to the naked eye and can be spotted and will then have to pull the plug and crash dive thereby spoiling any chance of attack but the destroyers will have a rough time seeing your little boat. additionally, in late war the escorts have radar so you have about a 95% chance of being detected and the surface approach is impossible unless radar hasnt come out yet __________________

01-07-16, 08:51 AM	#5
RConch Captain Join Date: Jul 2002 Location: No. Virginia Posts: 619 Downloads: 518 Uploads: 0	When you go in on the surface, set your depth for 7 meters and go in at 1/3 or standard speed. Only your tower is exposed. __________________ "Noch und Noch" Prowling the Nord Atlantik with GWX 3.0. Last edited by RConch; 01-07-16 at 09:40 AM.

01-07-16, 02:41 PM	#6
GT182 Ocean Warrior Join Date: May 2005 Location: New Castle of Delaware Posts: 3,231 Downloads: 658 Uploads: 0	If you get in front of a convoy just run at silent running or sit and wait at all stop. Escorts won't even know you're there..... unless they run over you. Then you can let them pass and pick out the juicy targets like the tankers and big cargo ships. I wait until I'm inside the convoy and them wreak havoc. The escorts will have no idea where you are until you thin the heard. Then pick them off one by one. One trick I've used is to lie and wait under a ship that's dead in the water and not sinking. The escorts will circle and eventually give up and leave seeing they can't depth charge you. __________________ Gary No Borders, No Language, No Culture =s No Country I'm a Deplorable, and proud of it.

05-26-16, 05:44 AM	#9
Aquelarrefox Commander Join Date: Apr 2013 Location: Buenos Aires Posts: 456 Downloads: 159 Uploads: 0	hey hey, does the radar detection of periscopes is intantaneous when periscope rised at 4000m? Even with 25 seconds rised it? i think radar should work worst in short ranges. wich mod should be recomended to twick how radar works as many have been done to fix viasual sensors? something like this: http://www.subsim.com/radioroom/show...9&postcount=33 some experience with it? theres a torpedo range correction too. __________________ Having a HARD TIME with CONSOLIDATE GRANMA MOD... Last edited by Aquelarrefox; 05-26-16 at 12:12 PM.