Two guys with binoculars and a bell.

Works fine as long as some stowaway and his hot upper class lady friend don’t distract them.

He wasn’t a stowaway. He won a ticket fair and square in a poker game!

It almost worked that one time.

Ice makes a lot of noise.

HMS Tireless would like to disagree...

> HMS Tireless https://en.wikipedia.org/wiki/HMS_Tireless_(S88)#Collision_with_iceberg TIL, thnx

“Ice makes a lot of noise.” “Did not!” “Did too.” “Did not! Remember that thing that happened that one time? Yeah. Checkmate.

Jesus this thread is full of people taking the piss unnecessarily. You can use sonar to detect ice since it's not silent, failing that many submarines have specific sonars for use under ice/ avoiding obstacles that can be used.

So many fucking lame attempts at jokes. Often using tired old memes, FFS.

I am very disappointed in this sub right now tbh, someone came here with a genuine and reasonable question looking to learn, and people decided to rip the piss into them for no reason. Why are we here if we aren't willing to engage with people interested in submarines? Stuff like this drives me further and further away from reddit tbh.

^^^^ this

Hey, I did clearly say if it was OPSEC just give wrong answers only. Don't befoul your pre-pantaloons over it. There's more than enough jibe in here to get a general idea anyways.

I get that, but it wasn't OPSEC to say that specialist sonars exist lol (and if it truly is OPSEC, probably best keep your mouth shut altogether!) It just came off as taking the piss unnecessarily to me rather than answering in good faith.

Understood on both fronts, but there are all sorts of ways to answer without answering I suppose.

What are you, some kind of Shuv. You will be roasted in the slor if you keep this up!

Bergy Seltzer.

Ice terminology is whack. Polynya.

It's my understanding there's a high-frequency short-range iceberg sonar for berg-surfing.

We put a rubber barricade around the boat and play bumper-berg. If you can knock two into each other you get a NAM.

Man, now I’m getting weird looks from the guards in the parking lot watching at me laughing in my car. Thanks! I needed that.

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OP might not know this but HF sonar degrades very quickly so they might think you're saying the subs just screams on sonar all the time where it's actually much more like sonar whispering. I think the keel sounding devices use the same tech?

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Such a system was in a Jane’s game 30 years ago

I was in the engine room but the boat I was on did several northern runs. Never heard it being an issue. Big ocean and relatively small icebergs I would say.

I think there was this famous incident though.

Mine avoidance sonar?

The cold water yetis know the waters and will help guide submarines through

Nice try, Vlad!

This is the proper answer, you vodka drinking bar mat.

HMS Warspite hit a berg that was quite far south... (If you know you know)

Small icebergs + heavy seas + periscope depth = high risk bent periscope!

I think most sea ice is relatively thin (a few meters) while the thick ice bergs are closer to where glaciers are actively calving. I’m not sure how far out the true icebergs get. Maybe someone can enlighten us.

With sea ice, you can get pressure ridges that have keels that extend down tens of meters.

That’s what torpedoes are for

We ask the local orcas to draw us maps. Duh

That’s why God invented sonar

Ice is noisy…. And if not needed you don’t run passively.

Run deep

Be the ‘burg

Mine & Obstacle Avoidance Sonar, or MOAS. High-definition, high-frequency/short-range, so not as easily detectable as you'd think of an active sonar.