River Class (OPV) (RN)

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Re: River Class (OPV) (RN)

Post by donald_of_tokyo »

Caribbean wrote: 06 Oct 2022, 20:53I believe the Sigma 10514s are the ones that will be replaced by the two new T31s.
Really? I though Indonesian Iver-Huitfeldt derivative is to replace some of their numerous corvettes?
Interestingly, they are about the same dimensions as many have proposed for the RB3, if it ever were to be built. 105m x 14 and 2350t or thereabouts....You can pack a lot into a small hull, it seems. Carries 1x76mm, 2 x 20mm, 30mm Millennium gun, 12 x Mica VL, 8 x Exocet and 2 x triple LWT tubes and hangar/ flight deck for an AS565 Panther.
Needs a crew of 120, though
It is as armed as RN Type-31. So, basically, equipment defines the crew size... But, hull size also matters. Thus, I think Indonesian navy is simply not so much putting stress on automation (automation is expensive).

Looking at this photo, I felt that River B2 is an OPV, while Damen Sigma 10514 is a corvette. River B2 has high bow. I think she is devoting many of her weight margin to improve the sea-keeping capability, while corvettes typically with lower bow are saving the weights to be used for armaments. A different policy on the hull.

River B2 is really focused on being a good OPV.
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Re: River Class (OPV) (RN)

Post by donald_of_tokyo »

Hopefully minor issue for HMS Trent.

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Re: River Class (OPV) (RN)

Post by donald_of_tokyo »

She now looks like in the Yokohama Honmoku dock of Mitsubishi (She moved from Yokosuka). I think she will be attending the JMSDF international feet review planned on 6th Nov. She will be representing UK there.


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Re: River Class (OPV) (RN)

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Re: River Class (OPV) (RN)

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Re: River Class (OPV) (RN)

Post by donald_of_tokyo »

In the meantime, HMS Forth was also working hard. Welcome back to her home, Mare Harbour.

see twitter.com/HMS_Forth/status/1586485510427783169

It's good to be home. We have now happily returned to the Falkland Islands after a period away exercising with our international partners

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Re: River Class (OPV) (RN)

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Re: River Class (OPV) (RN)

Post by donald_of_tokyo »

Along with our sister ship HMS Tamar, we (HMS Spey and Tamar) are the ‘Greenest’ warships in the Royal Navy. As IMO Tier 3 compliant ships, we have freedom to operate in emission-controlled areas around the globe, many of which lie in our Indo-Asia Pacific operating area.

Interesting argument. Having a smallish, environment friendly patrol ship has "some" merit, even if it is not large.

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Re: River Class (OPV) (RN)

Post by donald_of_tokyo »

HMS Spey joining Keen sward, US-Japan exercise with Australia, Canada and RN joining.

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Re: River Class (OPV) (RN)

Post by donald_of_tokyo »

From see twitter.com/NavyLookout/status/1594366119019626496

HMS_Spey participated in 10-day exercise KeenSword involving 30 ships and 370 aircraft from Japan, US, Australia and Canada. 1st time RN has joined in this major biannual Pacific exercise.

Spey's main role was to protect larger units against fast attack craft during a simulated amphibious assault.


Showing that "how a very lightly armed asset can do something in real war scenario". Good.

Of course, the "amphibious assault" may not be against 1st-tier nations. But, after WW2, there have been no "amphibious assault against 1st-tier nations", although there were many many amphibious assault operations world-wide against 2nd or 3rd-tier nations/militia.

"Incapable to survive against 1st-tier enemy" is not always critical. Even River B2, and of course T31, will find good tasks to do in real war. We shall not underestimate it.

On the other hand, whether "1x 30mm gun, 2x 12.7mm MG, 2x 7.62mm gatling, and 4x 7.62mm MG" is suited for these tasks is not clear. Especially that we can foresee cheap (numerous but short leg), middle (dozens with a few km leg), or semi-high-end drones (slow but very long-range) UAVs (and also USVs) coming in these "war against 2nd and 3rd tier nations/militia", any equipment needs must be always reviewed.

It could be 40mm 3P, 30mm proximity fused rounds, LMM mounts, radio-jammer, or something like US UAS Coyote systems. Let's see how it goes...
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Re: River Class (OPV) (RN)

Post by Tempest414 »

Good to see her getting stuck in some kit she could carry today in this task would be

2 to 4 x BAE unmanned Pacific 950 armed with 12.7mm or 30mm mount
2 x Camcopter S-100 armed with 2 x LMM
20 x Hero 120 Loiter weapons

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Re: River Class (OPV) (RN)

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Re: River Class (OPV) (RN)

Post by donald_of_tokyo »

HMS Spey and Tamar, both in Yokohama.

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Re: River Class (OPV) (RN)

Post by Ron5 »

I much prefer this paint scheme over the ones used on the UK based Rivers. Very handsome.

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