Hydrophone Distance Estimation

ChrisPhoenix · 10-04-19, 03:10 AM

The Discord Channel is a little messy in terms of finding information in my opinion. I rejoined it, read thourgh some stuff but hard to find anything. There is just too much going on.

Just heading towards the convoy is fine for the most situations sure, but i would also like to be able to know if a destroyer is at safe distance to surface by just relying on the hydrophone for example.

Of course i don't want to say "alright contact is exactly 5435m away." But plus or minus a 1000 meters would be nice to know.

Pisces · 10-04-19, 05:32 AM

It should be safe if you do a periscope check before you surface. Should be standard procedure anyway.

Yes, discord is messy. But you should be able to search the channels for keywords. Rule seems to fit as one.

ChrisPhoenix · 10-04-19, 09:07 AM

I didn't know you could do that.

That actually helps a lot! Thank you.

Pisces · 10-04-19, 09:43 AM

As for foggy conditions, yeah, you better be on your toes and pay attention. Make sure the deck-watch is doing it's job. Either slow down and turn away at the first sight, or immediately dive. Or both. Or don't go fast in the first place. Oh heck, do all to be sure.

Superesse · 10-05-19, 05:44 AM

Slow down AND dive is not a good idea, right? 😁

Pisces · 10-05-19, 05:51 AM

Dive might take longer as you slow down, but you don't decrease distance as much either. At 18 knots you move 9.36m per second. Also, if you can retreat into the fog again, you stand a better chance of escaping than being submerged (until radar becomes a thing)

ChrisPhoenix · 10-05-19, 01:28 PM

I actually picked up some things from Discord now. I have yet to test them tho. Regarding distance to destroyers: i'd rather not stick my periscope out if i'm not 100% sure he is far enough away. That's why i'm trying to do it with hydrophone. Better stay deep...

Regarding Diving speed: I only go full speed while diving when the alarm bell rings. Which is only when we are spotted at the moment. Copied that from Silent hunter, where alarm automatically meant full speed. In any other situation i'd rather dive slowly, because it is much easier to stabilise the boat when you do it slower. Going full speed and maintain periscope depth is rather hard.

Aktungbby · 07-23-23, 06:03 PM

Quote:

Originally Posted by kamini982

yes sir you are right.......

No doubt thru trial and error

Kralizec · 07-23-23, 10:36 AM

Quote:

Originally Posted by Aktungbby

kamini982

Do you think it would be possible to reduce the number these types of comments? It takes up so much space and contributes nothing, while reducing the signal to noise ratio of every single thread on subsim

10-04-19, 05:32 AM	#2
Pisces Silent Hunter Join Date: Dec 2004 Location: AN9771 Posts: 4,892 Downloads: 303 Uploads: 0	It should be safe if you do a periscope check before you surface. Should be standard procedure anyway. Yes, discord is messy. But you should be able to search the channels for keywords. Rule seems to fit as one. __________________ My site downloads: https://ricojansen.nl/downloads

10-04-19, 09:43 AM	#4
Pisces Silent Hunter Join Date: Dec 2004 Location: AN9771 Posts: 4,892 Downloads: 303 Uploads: 0	As for foggy conditions, yeah, you better be on your toes and pay attention. Make sure the deck-watch is doing it's job. Either slow down and turn away at the first sight, or immediately dive. Or both. Or don't go fast in the first place. Oh heck, do all to be sure. __________________ My site downloads: https://ricojansen.nl/downloads

10-05-19, 05:51 AM	#6
Pisces Silent Hunter Join Date: Dec 2004 Location: AN9771 Posts: 4,892 Downloads: 303 Uploads: 0	Dive might take longer as you slow down, but you don't decrease distance as much either. At 18 knots you move 9.36m per second. Also, if you can retreat into the fog again, you stand a better chance of escaping than being submerged (until radar becomes a thing) __________________ My site downloads: https://ricojansen.nl/downloads

10-04-19, 03:10 AM	#1
ChrisPhoenix Bosun Join Date: Feb 2019 Posts: 62 Downloads: 7 Uploads: 0	The Discord Channel is a little messy in terms of finding information in my opinion. I rejoined it, read thourgh some stuff but hard to find anything. There is just too much going on. Just heading towards the convoy is fine for the most situations sure, but i would also like to be able to know if a destroyer is at safe distance to surface by just relying on the hydrophone for example. Of course i don't want to say "alright contact is exactly 5435m away." But plus or minus a 1000 meters would be nice to know.

10-04-19, 09:07 AM	#3
ChrisPhoenix Bosun Join Date: Feb 2019 Posts: 62 Downloads: 7 Uploads: 0	I didn't know you could do that. That actually helps a lot! Thank you.

10-05-19, 05:44 AM	#5
Superesse Seaman Join Date: May 2019 Posts: 34 Downloads: 1 Uploads: 0	Slow down AND dive is not a good idea, right? 😁

10-05-19, 01:28 PM	#7
ChrisPhoenix Bosun Join Date: Feb 2019 Posts: 62 Downloads: 7 Uploads: 0	I actually picked up some things from Discord now. I have yet to test them tho. Regarding distance to destroyers: i'd rather not stick my periscope out if i'm not 100% sure he is far enough away. That's why i'm trying to do it with hydrophone. Better stay deep... Regarding Diving speed: I only go full speed while diving when the alarm bell rings. Which is only when we are spotted at the moment. Copied that from Silent hunter, where alarm automatically meant full speed. In any other situation i'd rather dive slowly, because it is much easier to stabilise the boat when you do it slower. Going full speed and maintain periscope depth is rather hard.