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!
reply
share