Engaging Convoy

[1480]

Are you running the stock game? TM? RFB?

This thread may be of help:http://www.subsim.com/radioroom/show...=enemy+sensors

[John Channing]

Here is how it worked in real life.

http://www.ibiblio.org/hyperwar/USN/....html#section4

Works in the game, too!

JCC

[ridyard12]

Originally Posted by John Channing

Here is how it worked in real life.

http://www.ibiblio.org/hyperwar/USN/....html#section4

Works in the game, too!

JCC

thats a very helpful website, and well pointed out.

[Nisgeis]

Originally Posted by John Channing

Here is how it worked in real life.

http://www.ibiblio.org/hyperwar/USN/....html#section4

Works in the game, too!

JCC

One part of that says 'Try to keep own and enemy's wakes between the submarine and her pursuers.' Does your own submarine create a wake when it is submerged, that would interfere with enemy passive and active sonar, or would that piece of advice only apply to surface operations (though I didn't think sound detection worked against subs on the surface)?

[seafarer]

Well, a wake is just the turbulence and disturbance behind anything passing through the water (or air). So yes, a submerged sub has a wake.

[peabody]

Ok, guys (and gals?) I appreciate all the help but you forgot one very important fact. When you are trying to sneak away very quietly MAKE SURE YOU DON'T RUN INTO THE SHIP YOU JUST SANK. I think that is a very important thing to know. I knew the water wasn't very deep where I was so I had to watch my depth, so when I heard the noise I thought I hit bottom, but when I came up a bit, it still was making a racket, so I looked and this is it.



But anyway I did take your suggestions and met a small convoy and sank a 'Large Old Passenger Carrier and a Modern Passenger Liner. This is one of them. Then I went north because I was so embarrased the destroyers couldn't attack me they were laughing too hard.
I ran in to a Task Force in the northern gap going from the Sulu Sea to South China Sea and sank an Ise Battleship and went to 250ft. Ahead 1.3 and watched the map and kept turning away from searchers. I wish the pic was bigger but I was already on my way to 250 ft when I heard 'torpedo impact' so I took a quick look. I shot 6, I remember at least 4 hit but I'm not sure if they all did I was changing direction and depth at the time.


Thanks again for you help and suggestions.

Peabody

[Capn_Sinky]

On several of the quick missions I kept getting busted by the escorts before I could get close enough to fire. I would think I had sliped through the screen only to have them hit me from behind. The old "out of sight, out of mind" trap. Keep in mind that destroyers are deaf to the stern, but so are you. Dont get too comfortable, make a 45 to 90 degree turn every so often to check for destroyers behind you when you are below periscope depth. Haven't read about it that much in WWII references, but during and after the cold war it was refered to it as "clearing the baffles."

The best luck I have had in breaking through screens has been approaching below the thermocline (depends upon water temp, depth to seafloor etc. The guy calling out the depth will let you know when you have passed through it.) while rigged for silent running. Note you can rig for silent running and set your speed to whatever you want, but if you are running faster than ahead one third the chances of them picking you up goes way up. In the control room I have a hard time determining if they are searching in my direction because of the background music. The best thing to do is turn the music off or go to the sonar station every so often to listen for pinging. The louder and closer together the pinging the closer they are to detecting you. Watch the helmsman as well. I have noticed that when they are really close the helmsman starts looking nervious and starts looking up at the celing like he expects to see an ashcan fall out of the celing.

Fighting in the shallows is another thing all together. The chance of being detected actually goes down if you can sit near or on the bottom as long as you are set to silent running. The chance of them hearing you there is low, and since you are sitting close to or on the bottom the chance of them pinging you are reduced as well. The problem with shallow water combat comes in when you fire off that MK XIV and they follow the bubble trail right back to your location. Got to shoot and scoot.

Good Luck and Good Hunting
Capn_ Sinky (aka Stinky)
O.I.C.I.C.
Officer In Charge of Ice Cream
USS Drum

[peabody]

Originally Posted by 1480

Are you running the stock game? TM? RFB?

This thread may be of help:http://www.subsim.com/radioroom/show...=enemy+sensors

I think that is it, I will give it a try. I think from that thread it is probably Quillan's idea, I have used TC because I have limited time to play and the Merchants are so slow. I will try without TC and see what happens.
Thank you to all who offered help!!

Peabody

[Rockin Robbins]

Part of John Channing's reference:

A persistent enemy may remain in vicinity 24 hours or longer; therefore, conserve the battery by balancing or bottoming, when practicable.

Do you know what "balancing" is? It is a twin to bottoming, which is sitting on the bottom lightly by carrying just enough ballast to sit motionless on the bottom without use of engines of other noisemaking equipment. This is dangerous as if you are too heavy, localized stresses could cause hull damage.

Balancing is similar exploitation of a thermal layer. With the boat at neutral buoyancy, a condition never exactly achieved, if you sit motionless in the water you could remain there suspended until someone uses the head and your buoyancy is no longer neutral. Maintaining neutral buoyancy for fifteen minutes drove many a crew batty while they were being evaluated by the Captain's CO. It was a useless exercise, whose main value was determining whether the crew could continue to work together efficiently under severe stress.:rotfl:

However, with a friendly thermal barrier down there, we have a new water surface. Neutral buoyancy in the top, less dense water, is flotation buoyancy in the colder and denser water below. There is a range of displacements that will sink in the warm layer, yet float on the cold layer. See what I'm driving at? If you hit the middle of that range, now you can sit on top of the dense layer with all power off. Since there is a range of displacements that satisfy your suspended conditions, this is something you could do for days, if necessary, with all systems turned off. This is absolutely the quietest a sub can be, and the only limitation is your air supply so the crew can continue to breathe!

On a trim dive, the object was to mark the negative buoyancy tank at the neutral buoyancy position. Then you decended across the thermal barrier and marked it for neutral down there. Any level between the two marks allowed you to sink to the the bottom of the upper layer and float on top of the lower! I've always wanted to issue the order, "Flood negative to the mark!" Now you know what that means.

Now the bad news. We have no control over the ballast tanks. We can't do this. An important evasion stragegy, which saved several subs, is totally outside our grasp. Merry Christmas!

[peabody]

Originally Posted by Rockin Robbins

Now the bad news. We have no control over the ballast tanks. We can't do this. An important evasion stragegy, which saved several subs, is totally outside our grasp. Merry Christmas!

Gee, Thanks Rockin "candy bars taste good but you can't have any"

Peabody

[-Pv-]

It's proably been noted:
Battle Stations increases your noise level. Turn it off for max quiet and stand down your DC crew. Keep your profile to the enemy at mimimum. I have found using 1 knot is preferable to all stop. The noise is not that much increased and the manouvability allows you to keep turning toward the closest enemy escort. Alert escorts means you have to plan your attack so you launch torps at max range and hope for the best.
-Pv-

[walrusbomb]

it could be they spotted you before you submerged.

[peabody]

Originally Posted by walrusbomb

it could be they spotted you before you submerged.

I kinda doubt that because I was submerged as I was coming up to my "sit a bit" site. It's the Northwest cornor or the Celebes Sea when it connects with the Sulu Sea. If you sit there for a while something WILL come by.
It was a good idea, and could have been the reason at other times, but on this occassion that made me finally ask the question I was submerged for a while because I know there may be something there when I get there.

Peabody