FDR – Maritime Futures Part 2 (Another view on C2)

16Comments

There is no doubt to anyone who has read my comments or my guest articles on Think Defence that I am an unabashed ‘fan boy’ of the Royal Danish Navy’s Absalon Class “flexible support ship”.

What I will attempt to do in this article is explain why I think it would make an excellent basis as an “off the shelf” design for the UK Royal Navy’s Future Surface Combatant’s “mid tier” C2 requirement.

Background reading and viewing

For an introduction to the Absalon class, rather then me recounting all its excellent features here, see the following:

Absalon page on Naval Technology

Absalon page on Wikipedia

Canadian American Strategic Review (CASR)

Danish Naval History

There is also an excellent set of external and internal photographs on the Photobucket site at:

http://s296.photobucket.com/albums/mm200/fsorensen/Ships/Absalon/?start=all

Finally, dependant upon your country, go to the Discovery Channel site (.com, .ca or .co.uk) and look for the episode of Mighty Ships about the Absalon when she was acting as Commander CT150 in the Gulf of Aden.

Context

In my own personal fantasy masterplan for the future of the RN surface fleet, an Absalon based C2 would sit between a T45 based C1 and a C3 multirole OPV / MCMV / survey ship that would be at the lower end of the spectrum for such a vessel.

I have chosen the Absalon as the basis for C2 because:

  • It is “off the shelf” – a proven design that is in service
  • It fits the bill – find me a more flexible design (for the price) !
  • It is relatively cheap – well the Danes managed to build them cheaply, doesn’t mean we would not screw it up of course…….

In line with this philosophy, I would purchase 12 of these vessels (at least), with some kit being transfered across from T23′s as they are retired, but other kit being based on that of the current Danish vessels to kept the costs down. If the Danish MOD transfered the rights to be the “UK Design Authority” to the UK MOD, I would either compete the procurement, so that any capable dockyard could submit a bid, or spread the build among the originating Danish dockyard, and capable UK facilities / companies.

However one thing is key, gold plating is out. I am trying to be pragmatic by suggesting this vessel, but I will immediately contradict myself, and introduce a small amount of risk by suggesting some ‘small’ changes that would make the vessel more suited to the RN role.

Change number 1: Smaller Flex deck

The Flexible Support Ship has a large ‘flex deck’ which is a ro-ro deck, capable of carrying multiple 70 tonne Leopard 2 Main Battle Tanks.

See the schematic diagram below, which shows the flex deck in yellow, clearly showing its size

Clip 5 FDR   Maritime Futures Part 2 (Another view on C2)

The RN has dedicated amphibious shipping and I don’t think we need this full capability to carry large vehicles, or a larger number of smaller vehicles, or a 100+ troops in containerised accommodation. So I would cut the flex deck of at the forward bulkhead of the hanger, removing roughly a third of its length.

The space freed up would be used for additional modular C4I space for USV / UUV / UAV operations, or towed array sonar ops (see below). Also some additional communal space (a gym ?) would not go amiss on vessels designed to spend a lot of their time at sea. Perhaps an extension to the sick bay would be useful too. Take a look at the schematics in some of the photos at the Photobucket link above, and of the internal space. There is no doubt that the space would be used in interesting and useful ways !

The remaining flex deck would be used to facilitate various capabilities, providing the RN’s answer to the U.S. Navy’s LCS. The flex deck could for example house boats, unmanned surface vessels or containerised towed array sonar equipment. An enhancement would be a electrical scissors lift, or a hydraulic lift from the flex deck to the hanger, this would allow additional UAV’s to be carried on the flex deck (at least Schiebel S100 Camcopter sized aircraft, any maybe even MQ8 FireScout sized) – an idea stolen from the LCS.

Change number 2: Diesel electric propulsion

The T45 is an ‘electric’ ship, and so would be any T45 derivative C1.

So it seems sensible to change an Absalon based C2 from direct shaft drive diesel to diesel-electric. In this case the ships may even use the same “propulsor” pods as on the T45 / C1. An added benefit in removing the shafts and gear boxes would be in reduced vibration and radiated noise – very useful for a ship with an ASW role. It should be noted that the Iver Hutflelt class Patrol Ships (AAW Destroyes) currently being built, are a derivate of the Absalon, and they have bigger diesels for higher speeds.

Detail changes

The Absalon has a core crew of approx. 100 and it has ‘good’ accommodation for another 70. However its “hotel services” – galley, laundry, sewage plant (!) are sized for a total of 300 (based on those soldiers living in containers on the flex deck). We could scale this down in the RN variant. The standard crew numbers and accommodation would do nicely for the envisaged roles, with the additional 70 including perhaps any of the following:

  • ships flight for 2 x Merlin HM1,
  • a platoon of RM (approx 35),
  • a command staff,
  • additional RN sailors for Visit Board Search and Seizure (VBSS or “boarding party”) teams, etc.

As noted above, some additional accommodation or communal space might be added.

As can be seen in many of the excellent photos, the Absalon carries two Combat Boat 90 E fast boats which are deployed and recovered via a stern door. The RN could procure a number of similar boats, or just use the facility for deploying armed 11m RHIB’s (which would be cheaper).

Clip 6 FDR   Maritime Futures Part 2 (Another view on C2)

Some modular kit might need to be developed to allow this facility to also deploy and recover Unmanned Surface Vessels (USV) and Unmanned Underwater Vehicles (UUV) for ASW / MCMV use.

The Absalons also carry 4 RHIBs, in port and starboard ‘hangers’, 2 larger ones for boarding ops etc (which are seen in the Discovery Channel show, with a bow mounted MG) and two which look smaller , possibly akin to the ‘Gemini’ inflatable used as general purpose boats by RN ships.

Sensor, Communications and Combat System fit

The communications fit would have to be standard RN comms fit, including Integrated Communications System, radios and satcoms as carried by T45 / C1 etc.

The main sensors would include the Artisan radar (new or taken from retiring T23′s) in place of the Absalon’s SMART-S, but the same surface search set carried on the after mast could be retained. With no need for the fire control radars, the electro-optical ‘turrets’ carried on port and starboard sides of the bridge roof on the T45 would be carried ‘fore-and-aft’ on the C2 in place of these radars.

The Command System could be the exact same Danish C-Flex system as fitted to the Danish vessels, or for maximum commonality, it could be the same system fitted to the T45 and T45 based C1 (giving through life support costs benefits, including reduced training costs).

Similarly the C2 could retain the Absalon’s Atlas Electronic hull mounted sonar, or the T45′s MFR7000 set for maximum commonality.

The main gun could be the MK8 4.5inch lifted straight off the retiring T23′s, the BAe Naval 155mm, or my preference, the OTO Melara 5 inch. However to be pragmatic, lets stick with the 4.5 inch gun.

In place of the Absalon’s Oerlinkon 35mm “Millennium” gun based CIWS, it is likely that the C2 would mount a Phalanx MK 1B. As well as the cannon the Danish ships mount 4 x .50 cal MG’s, 2 on the ‘bridge wings’ and 2 on the aft superstructure. I would fit 2 x IAI Typhoon remote weapons stations with the CTA International 40mm Case Telescoped Ammunition gun on the after superstructure. In Israeli use these mountings also have an MG over the cannon barrel, and up to 3 Spike missiles. If we wanted to go this route, that could be 3 x Starstreak missiles.

2 x ‘Mini-Typhoon’ RWS armed with .50 cal MG’s would be mounted on the bridge roof. The bridge wing MG’s would probably be the RN’s new 7 barrel 7.62mm Mini-gun (although I would prefer the 3 barrel GCAL 50).

The Danish ships can carry up to 3 modules of 12 VLS cells (the MK6 VLS) for ESSM,  for a total of 36 missiles. In the RN case these would be replaced by 36 to 40 Common Anti-Air Modular Missiles (CAMM) when it eventually enters service. If the ships are ready before the missile, it would not be the first time an RN ship has gone to sea operationally, while being less than fully equipped !

As their surface-to-surface battery the Absalon’s can carry up to 16 Harpoon SSM’s. On C2 that could be Harpoon or preferably the Norwegian Konsberg NSM3 Stealthy anti-ship / land attack missile.

So, no gold plating, no developmental items, all “military off the shelf” equipment, either already in use by the RN or by allied navies.

However, I suppose the one capability I would add, that may not currently exist, is a palletised / containerised towed array capability, being loaded via the Flex deck stern door and stream via ports built into the stern on the starboard side of that door. The Thales CAPTAS-Nano might be configured for this “role on role off” ASW capability enhancement.

Also, to add a little ‘blue sky thinking’ – the main midships armament deck, and the deck below it are also ‘modular’, if you remove the Harpoon launchers from the Danish ships, you can also remove the power and control systems modules that sit beneath them. For littoral combat scenarios, or other ‘asymmetric’ operations, how about fitting vertically launched LM P44 missiles, or Patria NEMO or AMOS automatic mortars (don’t be fooled by the size of the AMOS turret, it has been trialled on a CB90H).

Aircraft

The Absalon has a flight deck sized for Chinook operations and a hanger big enough for 2 Merlin sized helicopters. That provides a lot of flexibility for carrying all current and projected RN helicopters; 1 or 2 Merlin HM1 for ASW, 2 Lynx, 1 Lynx and 1 Merlin etc If we eventually get round to purchasing more Merlin’s to replace Junglie Sea Kings, one ASW equipped Merlin HM1 and one ‘utility transport’ would provide a great deal of flexibility on a 6 to 9 month deployment. Add the  possible VTOL / helicopter type UAV’s mentioned early into the mix, and the flexibility just continues to increase.

Summary or roles and capabilities

The various incredibly flexible attributes of this Absalon based C2 design might be illustrated by a number of potential mission loads:

  • Peace time maritime security ops:  2 x Lynx, 2 x Combat Boat 90, 30 naval VBSS personnel
  • War time ASW escort  – open ocean: 2 x Merlin, containerised towed array, additional sonar operators and damage control ratings.
  • War time ASW – litoral: 2 x Merlin, up to 4 RHIB based USV with dipping sonar, USV operators and damage control ratings
  • Time of high tension MCM ops in distant waters: 2 x Lynx, 2 x USV, up to 4 UUV, unmanned vehicle operators and Mine Clearance divers.
  • Littoral strike operations: 2 x Merlin transport 2 x CB90E, up to 40 Royal Marines or special forces

So, our highly flexible, and hopefully relatively cheap, but highly cost effective C2 Frigate may look something like this:

Clip 7 FDR   Maritime Futures Part 2 (Another view on C2)

Based on a Graphic of the Absalon by M Conrads from PhotoBucket

Equipped to be useful in a ‘real shooting war’ – but cheap enough to be built in numbers, and cheap enough to run and flexible enough to take on the pirates, drug runners, people smugglers and maritime terrorists, as required – the Absalon based C2 Multi-role Frigate, as envisaged by the fertile imagination of Jed :-)

Tags: , , ,