There are Russian systems just like what you are suggesting. One of them is called Trezubets and is designed to primarily fire 220 mm very high-speed unguided rockets with 60 kg warheads. The system and its rockets have lots of interesting features that I cannot describe now, but here is a drawing.
Interesting... looks like it would be related to APS technology from the 1980s... Drozd/2 and ARENA...
I just think that it would lack effective range against heavier missiles.
Sort of like the argument against having 20 guns on you in a fire fight... at the end of the day it makes more sense just to have perhaps two weapons that are reliable and instead of carrying 8 other weapons you carry extra ammo for your primary and secondary weapon...
What I am saying is that lots of layers of defence is good from 30mm gatlings, medium range guns, long range guns, short range SAMs, medium range SAMs, lnog range SAMs, plus aircraft, plus of course electronic jammers and decoys to defend against incoming missiles. I think it would be more beneficial to add a 57mm gun with guided shells as that would be a multipurpose weapon, whereas this system would just be a simple short range claymore type weapon.
But I was thinking of a really, really last defence system that will able the ship to survive, even with hard damage. It was just an idea.
I understand what you are saying but it reminds me of those that claim the A-10 can survive with an engine completely shot out... once that engine is gone the next hit will be a kill so effectively it is leaving the battlefield one way or another... equally when it is know you are armoured to stop 30mm cannon shells (like the A-10) then most enemies will use SA-8s with 50kg HE warheads that no aircraft could survive... no matter how well spaced the engines are or how heavy the armour is.
Just a correction, when I was talking about jamming missiles I was saying you can jam the radar of the ship (as it happend for the donad cook) and his anti-air missiles become useless.
In this case you have just last defence systems and I think ships need more than canons. Canons and CIWS work with radars that can be jammed too , I don't kwow if the manual mode is good againt an anti-ship missile, but I think (it' just my opinion) it's not enough.
If the enemy are so close they have jamming equipment that can jam the main radars on a ship then they are close enough that that jammer aircraft should be shot down.
equally most naval SAMs and gun systems have optical backups.
More to the point if the main radar and SAM radars are jammed then likely the short range interceptors radar will be jammed too.
Laser guided shells from a 57mm, 76.2mm, 100mm, or 130mm gun should remain effective as they will be laser guided.
Considering the Argentines had the exocet and the Sea Dart and Sea Slug missiles in service they knew the limitations of those systems and used them very effectively.
Conversely the British had the Exocet in service and rather underestimated it repeatedly.
BTW Thanks for posting that info Morpheus...
BTW LSOS I don't think your idea is silly, but I think it does have a few flaws... if they can minimise those issues then they might create a useful system... I mean look at PAKET anti torpedo system... very clever.