The Dolphin Isles wrote:Is there a point to having modern subs run together in pairs or groups of some type? I know that there is the benefit of extra firepower, but it comes at the cost of reduced stealth and greatly reduced spread of patrols.
No.
Is it all just based on doctrine of whether you want super sneaky and lonely underwater cigars or more powerful and brazen packs of subs? Is there a good hybrid in grouping subs together only when they are taking on larger targets? I know the old days of the wolf packs are long over, but would temporary groupings well before combat occurred hurt radio silence too much? Or is this all just crazy talk and subs should remain singular assassins trying to do hit and runs without anyone noticing?
As has been mentioned the problem is coordination. The wolfpacks of old worked because they could be coordinated via long-range radio, which in turn was possible because they spent most of their time on the surface, where they could radio sightings in to Kriegsmarine command centers ashore, which would in turn blast out a radio alert to all U-boats in the target area to gather for an attack. It also worked because surfaced U-boats could match or exceed the speed of their target convoys, allowing them to rendezvous and still chase down their target.
This is no longer possible because a surfaced submarine is a dead submarine, and a submarine hanging out at periscope depth with an antenna buoy is a submarine that isn't cruising at a lower depth with its towed sonar array out listening for targets. While submerged they have no effective and suitably covert way to communicate and coordinate with each other for an attack even if they could meet. On top of this, while nuclear submarines can be extremely fast, they can't be both quiet and fast, and the most effective general means of protection for a ship these days is to simply maintain a speed above 30 knots. A submarine cannot chase down a ship moving this quickly without both giving itself away due to extremely noise and deafening its own sonar (thus likely losing track of the target ship). Which means that waiting for a rendezvous before attacking is rather impractical unless the target is a very slow ULCC or something.
The most effective way to employ a number of submarines in an area is to give each submarine a specific patrol area. This allows each submarine commander to operate with the knowledge that any other submarine he detects should be a hostile submarine since no other friendly submarines should enter his designated patrol zone. This also maximizes coverage and increases the chances that a hostile target will wander across a submarine's path, where it can be engaged.