I understand where you are coming from but in reality, how will having a bigger gun stop a ship/boat firing a ATGM? In the Malacca Straights by the time they know they are under attack they would be hit, it is then a response not a prevention. (I hope that makes sense) The weapons on a OPV are less important than the ELINT when it comes to fighting terrorists IMHO.
In relation to the Malacca Straights example. I accept there is the possibility that they may be tasked with something along those lines, but it would be a multinational effort where they were policing merchant vessels etc.. There is no conventional risk i.e. subs and air attack. It would be continuation of their NZ duties.
If the risk was higher then it would be a frigate tasking. And no one here denies that another frigate or two is needed, as well as an upgrade of the present ones. The OPVs are not and are not meant to be corvettes. They are meant to patrol NZ waters where the ‘enemy’ is criminal and economic. They are also supposed to free up the Frigates for more active operations globally.
Many Navies OPVs are armed in a similar way, as posted above I think a solution like NLOS-LS that can be fitted in a minimal time, but also used by the army is something to be looked at.
The OPVs fit a nessasary role.
I agree with other posts, I would rather see the ANZACs upgraded and another surface combatant added to the fleet. That would be a balanced fleet.
Yes agree - my ideal is that a third Frigate in addition to the 'Protector' fleet would be the best option. However given the shortage of personnel I'm not sure the RNZN could support any additional vessels in the short to medium term, even if the govt of the day did decide to make such a purchase (I wouldn't hold my breath for that, even given the apparent softening to the idea from National's Wayne Mapp).
Where I was coming from with regard to the OPV's being under-gunned is that I was working on the assumption that a thrid frigate is highly unlikely, and that in the absence of such the OPV's should have been purchased with a lower-level combat capability (effectively a corvette, including the military spec hull & systems etc) - and hence a more serious weapons fit - of which a bigger gun is only one particular part.
In reality of course corvettes were never likely with the current bunch in power. 2 Frigates & 2 Corvettes would have provided the RNZN with a nice two-tier force that would have been very valuable in the region, and given a significant degree of operational flexibility.
Anyway that said, I'm sure the OPV's are going to prove very valuable at the kind of tasks for which they are envisaged. Yes granted - a bigger gun won't stop an ATGM, but it may allow you to take out the launch vessel before it gets in range of you! Yes - ELINT is a critical factor, it's not just the weapons that you need, you need effective systems for detection; identification; tracking & targetting if necessary.
The OPV's won't always have a SeaSprite embarked, but when tasked to potentially 'higher-risk' scenarios I'm sure there will be one on board - and that will add a huge punch to the vessel (perhaps a little conditional though - depending on servicability, weather extremes etc).
The OPV's are to have a secondary anti-terrorist role, however no-one (including the RNZN) has defined what this means. I'd speculate this assumes a potential for taking fire, so in that case ELINT etc & weapons are a critical factor.
Publicity material so far seen suggests the OPV's will operate NZ EEZ; Southern Ocean; Sth Pacific & Australian waters. Perhaps Malacca Straits patrol will only ever be attempted with a Frigate, not that there is a mandate for NZ to undertake that at present.
The OPV's 25mm Bushmaters on the MSI mount operated as a RWS with electro-optical control - it will be a VERY effective weapon and while the effective range is about 2km, it can hit out to about 5km - with less accuracy of course, but enough to give a potential terrorist craft something to think about before it attempts to get closer.
The 2 Browning 12.75mm are also something you don't argue with - there's nothing to suggest these will utilise the mini-typhoon mount - but I'd like to see that done as it makes them far more effective deterrent.
So okay, given their planned role the OPV's are going to be excellent platforms. The only thing I still maintain is that they should have a rear-facing Browning 12.75mm in a mini-typhoon mount so that they have 360 coverage day/night with accuracy!