Well I seem to have killed this thread...
Tasman said:
I found your last post extremely interesting and it is great to get first hand info re the RNZN along with some insight into its capability.
I wouldnt underestimate any of the NZDF. Yes I would agree that the ships could do with bigger teeth in some areas, but on the same token don't under estimate...
HMNZS Otago (the type42) in exercise with the Americans (when we were still allies not friends)
While the yanks were sitting in the dark, Otago decided to put up deceptive lighting, the yanks thought she was a fishing trawler... sailed into the middle of the group... and reported Guns Guns Guns...
Now Seacat can be used as a short range anti ship missile, (and is easier to hit a slow moving ship, than it is a fast moving aircraft) its not just anti air, the torpedoes can be set for a very shallow setting, and she also used the mortors to bomb the carrier...
Afterwards it was fully anylisied by the yanks and our selfs, and in theory knocked out 2 destroyers, a cruiser and badly damaged carrier. Before the yank cottened on and then sunk otago... They still use this scenario as a traing thing today.
As for Canterbury losing the sub at East Timor, well, that happens, and even with the most advanced gear you can get on the market today. Only in the movies is it that you the never lose there target... yes you can still fly under radar till you come into range of the mid range radar, yes you can still lose a sub like in WWII.
The sub can hide in different layers but becomes a sitting duck because they have to stay there in that layer. If Canterbury had a bit of time she would have swung round to a different angle hoping to see from the side... the Canterbury would have know exactly what the sub was doing, they just couldn't see her doing it. The sub can't move to fast else they make to much noise and canterbury would hear, even in the temperature layer.
The procedure is to the establish a datum mark, of last known position (as well as last course, and speed) and then after 5 minutes a radius of where the sub could be and so on.... usually if you are in firing range you would take a pot shot in that scenario, from both the ship and the helo... (because I can guaratee she was over head) and if you have a contact on active sonar, you aren't too far from it from being in range... but since we weren't actually at war... what were they to do...
the MK44 torpedo (fired from the ship) does a snake hunt pattern outwards from the ship till it locks on and or runs outta gas the just goes bang... well the MK45 does a spiral pattern till it locks on, and goes bang when outta gas as well... I am sure Canterbury was locked and loaded... The other thing is this, under normal procedures, two ships are sent to hunt a sub from a fleet, not just one... and you have a varied different search patterns.
The other thing is with the Indonesian gear it is well known that it is old (Older than our gear) and not maintained as well. They don't get spare parts from the Russians and i'm surprised they could even get a sub to go out and meet the fleet.
Canterbury also had anti torpedo counter measures, (same theory as chaff) make more noise than the screws are making for the torpedo to lock onto... If in a normal steaming in the fleet and the sub threat is high, she can tow a simple noise maker (a couple of metal bars that rattle) and is very effective, another one is a wave maker that is towed... as well as an electronic one.
If in the situation like east timor, I am positive the helo was airbourne and armed, usually carry one of each torp and a depth... if the helo is close and carrying one dropping a depth charge in the nearby to the incoming torpedo can confuse the incoming torpedo... firing an a random out going torpedo while stopping the screws, turning the ship into the torpedo, (makes a smaller target, less noise and closes the gap a lot quicker than the torpedo expects (in theory) ) and there are a variety of other tricks
The problem here was the rules of engagement,
don't fire until fired upon, and somebody has to be the first casualty of war. If the Sub commander did fire at canterbury and or the fleet... or we were already at war... then things would have been be a little different,