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Underwater battlespace entering 'one of the most exciting times': Capt Tim Green RN

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With 25 years of service in the Royal Navy under his belt, Captain Tim Green is well versed in the changing world of the underwater battlespace. Defence Connect spoke with Captain Green about the evolution of anti-submarine warfare (ASW), the build up of the UK Navy's capabilities and the nation's strategic relationship with Australia.

While defending against stealthy submarines has been the focus for many years, Captain Tim Green of Navy Command Headquarters said the challenges go far beyond that now.


"In my 25 years of service in the Royal Navy in uniform and now as a captain in Navy Command Headquarters, this is probably one of the most exciting times I've seen in what we call now the underwater battlespace," he told the Defence Connect Podcast. "We talk a lot about ASW, and that is still a NATO phrase that we use, anti-submarine warfare. But I think it's bigger than just submarines now. It's the whole sphere underneath the sea surface.

"So we call it the underwater battlespace because it's not just about the traditional manned submarines, it's about remote vehicles and it's about protecting some of the critical national infrastructure. Not just defence assets, but commercial assets, too, along the seabed. And I can go into a little bit more detail about those later on, but I think it's becoming more of a congested area. There are many actors, both nation-states and non-nation-state actors and commercial actors in this underwater battlespace."

But understanding the underwater battlespace is no easy task and presents its own unique challenges in the different regions.

“Fighting in the underwater battlespace … it's really, really complex. No two days in anti-submarine warfare or the underwater battlespace are the same just looking at the environment,” Capt Green said.



“Even if you're in the same bit of the sea the weather, the time of day, background shipping, even in the same bit of the ocean, changes the effect significantly. When you move to different water masses at different temperatures that has a massive difference. So the underwater battlespace in the north Atlantic will be different to the south Pacific and to the Indian Ocean and it changes on a daily basis.”

And while having the right people and undertaking the right training is crucial, technology is just as important in the underwater battlespace.

“So first and foremost, there's no paint by numbers in the underwater battlespace. It's a real art as well as a science,” Capt Green said.

“So it's very dynamic and no two days are the same so you absolutely need the best equipment. And technology has come on leaps and bounds, particularly in recent years, and staying ahead of that technological game is really, really important.

“But I place as much store in technology as I do also in people and training. And you can have the best kit in the world, but if your people are not training regularly, if they're not being challenged in new environments, and if they're not regularly exercising then it's a bit of busted flush. You need both. So it's people, it's equipment, and it's a broad range of experience in different regions of the world.”

And gaining more experience in these different regions is top of the agenda for Capt Green, who is looking to develop more exchange posts with the Royal Australian Navy and enhance the co-operation between the so-called Five Eyes intelligence community of the US, Canada, the UK, Australia and New Zealand.

“That’s something that ... we're looking to develop with the Royal Australian Navy because what we can do is we can do exchange posts, we already do that,” he explained.

“We have Australian Naval officers coming over [to] the UK and some of our guys going over to Australia. I want to increase that number and I want to increase that participation. So you get to operate in our climate and our north Atlantic backyard. We get to operate in your climate and in your Pacific and Indian ocean areas and we get that experience. And the good thing is we can share that.”

The UK is hoping to further enhance its relationship with Five Eyes members through the Type 26 vessel, which is up for selection in Australia’s Future Frigates program and Canada’s Surface Combatant Program.

Capt Green told Defence Connect that while the first of the vessels is yet to hit the water, with construction of the first batch for the Royal Navy currently underway, much of the vessel’s technology has come from the UK’s Type 23 frigate and has been upgraded in recent years.

“A lot of the technologies that are today on the Type 23 we've upgraded in the 21st century. We've refreshed them from our sonars, from our radars, and some of our weapons systems and we'll move this forward,” he explained.

“[It is] 21st century technology that is tried and tested, that has proven itself combat-ready that we'll put into the Type 26 so we can take that forward.”

One of the key pieces of technology praised by the RN captain is the noise hygiene, a crucial part of any ASW frigate’s DNA.

“The hygiene in the Type 26 is a generation leap ahead of where it was and it was very good in the 23, but it's a generation leap and you've got to get that in at the design phase,” he explained.

“You can't build noise hygiene in afterwards. You've got to do it from the drawing board to get it right. You've also got a big helicopter deck, which is really good because one of the primary systems you want in fighting in the underwater battlespace is a maritime helicopter that has the range, the sensors, and the weapons systems to support.”

To hear more from Captain Tim Green tune in to our podcast here.

Underwater battlespace entering 'one of the most exciting times': Capt Tim Green RN
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