Encounter with an uber DD

GoldenRivet · 10-14-08, 04:39 PM

you mentioned the snorkel.

were you using the snorkel at the time when he made the drastic turn toward you?

whats the year?

Task Force · 10-14-08, 04:41 PM

1943 or later, he had a snorkel.

GoldenRivet · 10-14-08, 04:43 PM

should have guessed that

so obviously the escorts had radar... so, if the snorkel was protruding from the surface of the water it is probably what gave him away.

meduza · 10-14-08, 05:49 PM

No, I wasn't using schnorkel, I was 25 m below the surface. The year is 1944, April.

What's the range of the Allies' hydrophones at this time? I know that a few months earlier was no more than 7-8km :hmm:?

The bastards are still above me, I'm unable to shake them off... and I'm running out of air, both fresh and compressed...

10-14-08, 06:12 PM

You may have run into Johnny Walkers units.
:hmm:
I think that's correct.

If so, it's an elite unit based on fact.
Best of luck Mate!!

meduza · 10-14-08, 06:49 PM

Thank you mate, I'm gonna need all the luck in the world! Maybe Johnny Walker himself is aboard this vessel.

I tried shooting her with a homing torpedo, but I miserably missed, and got another hole in the nose. I'm gonna wait untill she spends her ammo, and try to sink her, because my evading tactic is obviously not working.
At this depth I can dodge the depth charges, but it's getting hard to breathe. It's been more than 30 hours since we took some fresh air.

Steeltrap · 10-14-08, 09:11 PM

At any sort of speed the passive detection array of a DD is next to useless. The fact is the overwhelming majority of sub hunting by escorts relied on active means (sonar/asdic).
The best active system had a range of about 4,000yds max (and I think it may well have been less than that).
The best radar could detect a periscope at maybe 4,000yds.

All these would be subject to weather - the heavier the seas, the worse the sensor performance for surface vessels. It would also be affected by operator skill and 'luck' i.e. a periscope might be able to be detected by radar, but that assumes the sweep passed over when the scope was raised - with doctrine calling for periscope exposures of fewer than 5 seconds, that's a very lucky combination for the escort (or unlucky for the sub).

I'm not sure it's included in the sim, but depth charges disturbed the water so badly that there would usually be up to 1 minute in which no detection was likely - the turbulence etc played hell with active systems (lots of 'false' returns etc).

10-14-08, 04:39 PM	#1
GoldenRivet Subsim Aviator Join Date: Mar 2007 Location: Texas Posts: 8,726 Downloads: 146 Uploads: 0	you mentioned the snorkel. were you using the snorkel at the time when he made the drastic turn toward you? whats the year? __________________

10-14-08, 04:41 PM	#2
Task Force Rear Admiral Join Date: Jul 2008 Location: SPACE!!!! Posts: 10,142 Downloads: 85 Uploads: 0	1943 or later, he had a snorkel. __________________ Task Force industries "Taking control of the world, one mind at a time"

10-14-08, 04:43 PM	#3
GoldenRivet Subsim Aviator Join Date: Mar 2007 Location: Texas Posts: 8,726 Downloads: 146 Uploads: 0	should have guessed that so obviously the escorts had radar... so, if the snorkel was protruding from the surface of the water it is probably what gave him away. __________________

10-14-08, 05:49 PM	#4
meduza Ace of the Deep Join Date: Apr 2007 Location: on patrol Posts: 1,035 Downloads: 40 Uploads: 0	No, I wasn't using schnorkel, I was 25 m below the surface. The year is 1944, April. What's the range of the Allies' hydrophones at this time? I know that a few months earlier was no more than 7-8km :hmm:? The bastards are still above me, I'm unable to shake them off... and I'm running out of air, both fresh and compressed... __________________

10-14-08, 06:49 PM	#6
meduza Ace of the Deep Join Date: Apr 2007 Location: on patrol Posts: 1,035 Downloads: 40 Uploads: 0	Thank you mate, I'm gonna need all the luck in the world! Maybe Johnny Walker himself is aboard this vessel. I tried shooting her with a homing torpedo, but I miserably missed, and got another hole in the nose. I'm gonna wait untill she spends her ammo, and try to sink her, because my evading tactic is obviously not working. At this depth I can dodge the depth charges, but it's getting hard to breathe. It's been more than 30 hours since we took some fresh air. __________________

10-14-08, 06:12 PM	#5
Madox58 Stowaway Posts: n/a Downloads: Uploads:	You may have run into Johnny Walkers units. :hmm: I think that's correct. If so, it's an elite unit based on fact. Best of luck Mate!!

10-14-08, 09:11 PM	#7
Steeltrap Grey Wolf Join Date: Mar 2001 Location: Sydney, Australia Posts: 818 Downloads: 3 Uploads: 0	At any sort of speed the passive detection array of a DD is next to useless. The fact is the overwhelming majority of sub hunting by escorts relied on active means (sonar/asdic). The best active system had a range of about 4,000yds max (and I think it may well have been less than that). The best radar could detect a periscope at maybe 4,000yds. All these would be subject to weather - the heavier the seas, the worse the sensor performance for surface vessels. It would also be affected by operator skill and 'luck' i.e. a periscope might be able to be detected by radar, but that assumes the sweep passed over when the scope was raised - with doctrine calling for periscope exposures of fewer than 5 seconds, that's a very lucky combination for the escort (or unlucky for the sub). I'm not sure it's included in the sim, but depth charges disturbed the water so badly that there would usually be up to 1 minute in which no detection was likely - the turbulence etc played hell with active systems (lots of 'false' returns etc).