MovieChat Forums > The Hunt for Red October (1990) Discussion > A question about the torpedo battle at t...

A question about the torpedo battle at the end....


Exactly what is the safe distance from a torpedo explosion? Maybe it was for dramatic effect, I honestly have NO idea, but the first torpedo, the one they turn into to make it hit earlier than it should, had gone a good distance already?

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You are confusing/conflating two separate things.

Do you want to know what the safe distance from a torpedo explosion is?
Or do you want to know how far the torpedo has to travel before it can explode?

Because those are not the same thing.

You ask one thing, then describe the situation that has nothing to do with what you ask and is about the other.

Maybe you want to rethink what it is you are asking about and I'll do my best to answer you once you figure out what you are asking.


I joined the Navy to see the world, only to discover the world is 2/3 water!

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Or, you could simply spend 90 seconds typing out an answer for both. 

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Only CGSailor.

First I read you lecture the OP, spending 5-6 sentences to explain why his wording was wrong.......and then you don't even answer EITHER QUESTION.

Why did you even respond?

I figured once you were finished with being your natural, over bearing self you'd get around to actually giving an answer to at least one of the questions but nope, you posted just to give your lecture and then dropped the mike and left.

This reminds me of one of your other "fun" habits of responding to posts that pose a question or a topic and then you do not answer the question or you don't comment on the subject you instead complain that they broke your unwritten internet rule by not first spending one hour reading through every thread for 4,5,6 or more pages to first ensure that this topic hadn't once been covered by someone else two or more years prior. Only after researching all threads on the entire board, multiple pages and ensuring no one has ever (in the history of the internet) covered this before do you believe he/she is "allowed" to post on a topic.

Perhaps prompting an interesting conversation in the present is their goal rather than doing a research project for a history class. "Why don't you read a book?", "I'd rather have a good conversation." - Nathan Algren and Katsumoto

Just like on the Friends board. There have been hundreds, maybe thousands of comments about the Ross/Rachel breakup, were they/weren't they on a break, Ross was wrong, no Rachel was wrong subject. Every couple of months someone who's just recently starting watching Friends for the first time will come and start a topic on it (because it interests them and they want to talk about it) and all of the old, bitter board lifers will become incredulous because "the topic has been talked to death already" and they feel because they've personally seen it talked to death that, that disallows any newer viewers and fans to talk about it again in the present (which will be their first time).

If you didn't know the answer than you didn't have to post. If you did know the answer all you had to do was give the answer (whether to only one of the questions or both of the questions) but to post for no other reason than to "bitch" about the confusing verbiage of the question, that is just purposefully being an overbearing pain.

Dude, you can be annoying sometimes.

Now that you've given your lecture perhaps a more friendly, helpful, engaging poster will come along eventually and actually give the answer/answers.


Was ist der Sinn des Lebens?

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More the latter, how far the torpedo has to go before it arms itself. But it's also the "safe distance" that I referred to, if there's a safety feature that only allows it to arm after a certain distance. But hell, both things I wouldn't mind knowing.

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I can't say for sure, but it seemed logical to me that a torpedo might be set to arm itself at a given distance from the TARGET sub, rather than from the lauching sub. This, in my mind (a mind that has NO knowledge of submarines at all), would be to make sure that it doesn't go off accidentally in case it hit other objects in the water (fish, plants, whatever).
SO; the 1st torpedo missed (and also had the arming distance set to far away).
The second torpedo had the right arming distance, but Ramius accelerated straight into it, shortening the distance calculated for arming.
The third torpedo.... Well we know what happened there.

As for the minimum safe distance away from a detonating torpedo - I have no idea! :-)

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Like you, I don't know enough to give a qualified answer, but I would doubt you're right. It would overly complicate things, for no real net return. The risk of the mechanism failing would be increased if the mechanism was variable.

To my understanding (like with bombs and ATGMs) the reason these things arm after a set distance is to guard against accidental detonation prior to 'leaving the tube' per se. Once it's safely away, the last thing you want is for said mechanism to turn your weapon into a spit ball.

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To my understanding (like with bombs and ATGMs) the reason these things arm after a set distance is to guard against accidental detonation prior to 'leaving the tube' per se. Once it's safely away, the last thing you want is for said mechanism to turn your weapon into a spit ball.


Unlike bombs and ATGMs... Torpedoes can potentially detect, turn on, and home in on their own firing platform (i.e. the firing sub).

I joined the Navy to see the world, only to discover the world is 2/3 water!

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The reason why I did not immediately just give an answer is because I wanted you to think about what you were asking and how you were conflating two separate things.

Now to answer your question.

There are two separate things. Range Safety, and Run To Enable.

Range Safety prevents the torpedo from arming until after a set distance from the firing sub has been reached. You do NOT want one of these bastards going off right next to you. A modern Heavyweight Torpedo like a Mk-48 ADCAP doesnt even have to hit a ship. It detonates 50' below the keel and lifts a ship right out of the water snapping it in two (Look up HMAS Torrens on YouTube)

The exact range will differ between different systems and platforms.

What the range safety is for a US sub firing a Mk-48 would not be the same for what a Project 941 Akula class firing a Type 53-65 Torpedo would be.

Also, this range is classified. I can't even tell you for sure what it is. even if I knew, which I don't. But it will be something likely greater than 500 yards, more likely a 1000 yards.

Secondly, there is a "Run To Enable" feature on certain torpedoes.

A torpedo can be programed to travel in one condition, called the "Pre-Enabled" state, and a second condition after enabling. A wire guided toroedo like the Mk-48 can be changed after firing and updated during its run.

An example would be to run a torpedo out on a fixed course off axis to, but closing with a target, perhaps steering the torpedo towards the target sub's baffles, or blind spot. The torpedo would be fired in the pre-enabled state on this bearing at a slow speed setting to reduce noise and either below or above the thermalcline, depending on the depth of the target. At the aporopriate time, the torpedo will enable, accelerating to max soeed, going active on its own sonar transducers and turning towards the target bearing. shifting depth to come through the layer and at the target.

So long as the wire remains intact and the Torpedo has fuel and range, if the Operator sees that the torpedo has lost target or been seduced by decoys, he can shut the torpedo down to its pre-enabled state, redirect the unit back to the target, and reenable the weapon to go active again.


I joined the Navy to see the world, only to discover the world is 2/3 water!

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Great post.

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