Please tell me you're kidding. A good ASW ship operating under the best of conditions has AT BEST a 75% chance of detecting a torpedo coming in at 45 kn over 10 min?

 

He ain't kidding. Sonar checks every 5 minutes. Kinda throws the statistics outta whack, huh?

 

Moral of this story: Torpedoes are really mean.

 

:o :o :o :o :o :o :o :o :o :o :o :o :o

Please tell me you're kidding. A good ASW ship operating under the best of conditions has AT BEST a 75% chance of detecting a torpedo coming in at 45 kn over 10 min?

 

He ain't kidding. Sonar checks every 5 minutes. Kinda throws the statistics outta whack, huh?

 

Moral of this story: Torpedoes are really mean.

So in real life there is no doubt torpedoes are mean, how close to real life do these stats look, any one know?

I'd assume a lot of work goes into making a torpedo as quiet as possible, ditto the subs of course, and while the torpedo is going fast it is pretty small and I assume running at its most advantageous depth.

Interesting the 5 minute sonar checks (I assume we're talking passive?) is that some historical harpoon thing? In RL is listening done 360 deg, directional, combination?

DonT

So in real life there is no doubt torpedoes are mean, how close to real life do these stats look, any one know?

I'd assume a lot of work goes into making a torpedo as quiet as possible, ditto the subs of course, and while the torpedo is going fast it is pretty small and I assume running at its most advantageous depth.

Interesting the 5 minute sonar checks (I assume we're talking passive?) is that some historical harpoon thing? In RL is listening done 360 deg, directional, combination?

DonT

In RL each sonar device has a certain arc (towed arrays generally can't see a slice directly forward thanks to propulsion noises, bow sonar generally has a nice rearward gap,...). Most often if you have sensors to cover the full 360 degrees there will be operators covering the whole compass. You'll also have vertical limitations but the game does not model those other than docking you for cross-layer detection attempts.

 

I don't recall if the paper rules have the 5 minute interval but I do know the explanation was that even if the sensors are always going to town it still takes time to do a proper TMA (target motion analysis), hence the 5 minute rule. I'm not going to say that it is the best model for detecting the quite loud torpedoes streaming towards you. In the game torpedoes are annoyingly loud.

 

That 5 minute interval is for both active and passive sonar for the TMA reason (though really it should be easier with active sonar, you'll know range for sure which you don't with passive but you still need multiple ping returns to determine course and speed).

 

Sonalysts take on TMA: http://www.scribd.com/doc/49609458/16/Targ...on-Analysis-TMA

Brad's Tactics 101 series: http://harpgamer.com/harpforum/index.php?showtopic=3608

So in real life there is no doubt torpedoes are mean, how close to real life do these stats look, any one know?

I'd assume a lot of work goes into making a torpedo as quiet as possible, ditto the subs of course, and while the torpedo is going fast it is pretty small and I assume running at its most advantageous depth.

Interesting the 5 minute sonar checks (I assume we're talking passive?) is that some historical harpoon thing? In RL is listening done 360 deg, directional, combination?

DonT

In RL each sonar device has a certain arc (towed arrays generally can't see a slice directly forward thanks to propulsion noises, bow sonar generally has a nice rearward gap,...). Most often if you have sensors to cover the full 360 degrees there will be operators covering the whole compass. You'll also have vertical limitations but the game does not model those other than docking you for cross-layer detection attempts.

 

I don't recall if the paper rules have the 5 minute interval but I do know the explanation was that even if the sensors are always going to town it still takes time to do a proper TMA (target motion analysis), hence the 5 minute rule. I'm not going to say that it is the best model for detecting the quite loud torpedoes streaming towards you. In the game torpedoes are annoyingly loud.

 

That 5 minute interval is for both active and passive sonar for the TMA reason (though really it should be easier with active sonar, you'll know range for sure which you don't with passive but you still need multiple ping returns to determine course and speed).

 

Sonalysts take on TMA: http://www.scribd.com/doc/49609458/16/Targ...on-Analysis-TMA

Brad's Tactics 101 series: http://harpgamer.com/harpforum/index.php?showtopic=3608

Thanks Tony, as someone said recently, you learn something every day (well we do)

Don