BAE Systems has signed a contract with Damen Naval to provide a Bofors 40 Mk4 naval gun system for the Colombian Navy’s PES frigate, according to a press release.

The SIGMA-class PES frigate will be equipped with the 40 Mk4 system, which is designed for anti-aircraft and anti-surface warfare. Colombia becomes the second Latin American country to acquire the system, following Brazil, which selected it for its small- to medium-sized vessels.

“We continue to be a trusted partner in Latin America, providing world-leading capabilities in the region to support future growth,” said Stefan Löfström, marketing and sales director at BAE Systems Bofors. “We are delivering cutting-edge solutions that include advanced firepower and the lightening quick response that the Colombian Navy requires.”

The Bofors 40 Mk4 is a compact and lightweight naval gun that allows for rapid ammunition switching to address different threats. It is compatible with programmable 40 mm Bofors 3P ammunition, which has six function modes for targeting air, land, and sea threats.

Damen Naval Project Director Jasper Oreel noted the significance of the agreement. “Damen Naval is very pleased that BAE Systems Bofors will strengthen the versatile combat capabilities of the SIGMA 10514 based PES frigate with their Bofors 40 Mk4 for the Colombian Navy,” he said. “As this is the first (direct) procurement contract between BAE Systems Bofors and Damen Naval, we are looking forward to further establishing our business relationship and the PES project execution.”

The naval gun is set to be installed on the PES frigate in 2029.

George Allison
George has a degree in Cyber Security from Glasgow Caledonian University and has a keen interest in naval and cyber security matters and has appeared on national radio and television to discuss current events. George is on Twitter at @geoallison

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  1. These systems need to be part of the solution for UK GBAD. A 40mm Bofors round is going to be a hell of a lot cheaper than a land Ceptor missile.

    • The 40mm Bofors maxes out at 12.5km, whereas Land Ceptors will do 25km and over 40km with CAMM-ER. The Bofors is fine for a ship as a CIWS for anything that gets past Sea Ceptor, but you can’t cover the entire coastline with Bofors.
      For GBAD of the UK you need longer-range interceptors. It means you need fewer of them and you bring down incoming missiles out at sea and not over our crowded island.

      • Also, it’s very unlikely that we’d be facing swarms of cheap drones, given our geographical position.

        Russia would either have to sneak them all in to attack the UK from the inside, or stick a load of them on a ship and hope to get close enough to launch them. I can’t see either realistically having any chance of success.

        It’s missile attacks we need to worry about. I agree we need more air defence missile batteries, and give them a longer range. Personally I think a land-based version of Aster 30 would do. Add some Dragonfire lasers (once operational) to key sites as a last-ditch effort in case missiles fail.

      • Might be more useful in Cyprus though. Within drone range of multiple adversaries all with Drone capabilities. We’d run out CAMM long before they’d run out of drones.

      • You are not understanding the point I was trying to make is that a 40mm Bofors guarding critical defence and national infrastructure will be a very useful tool as a component of a multi layered integrated air defence network able to take on cruise and ballistic missiles, drones and aircraft.

      • That’s the published maximum range, the effective range is a lot closer and it depends on the type of target. For instance Bofors class its effective range for CIWS as 2500m, whereas against a surface target its effective range is 10,000m.

        In most respects the Bofors Mk110/Mk3 57mm is a significantly better weapon than the 40mm, especially as a CIWS. As the HE shell contains more explosive and shrapnel generating a greater kill radius Additionally, there are guided rounds now in service (ALAMO) and more in development (OKRA and MAD-FIRES). The standard proximity fused HE shell has an effective range of around 7000m, when used against airborne targets and 13,800 against a surface target. The Ordnance for Rapid Kill of Attack Craft or One Round Kills All (ORKA), has a similar range as the standard HE shell. Whereas the Multi-Azimuth Defense Fast Intercept Round Engagement System (MAD-FIRES) is a guided sabot projectile that also includes solid fuel rocket motor (which really makes it a gun launched missile). Has a similar effective range as the larger 76mm Leonardo DART, which Leonardo states is greater than 8km. Though MAD-FIRES with the rocket assistance has a higher terminal velocity, so it will either reach its target faster or still have enough energy for more manoeuvres at its max effective range.

        Perhaps there is a case to look at a land based version of the 57mm weapon system, that could also fire guided rounds? As it would have a significantly better effective range than the 40mm.

        • ” whereas against a surface target its effective range is 10,000m.”

          Not even close. At 10km you are with gun at 45º. It is far from effective.

          • In the ground support role, its the ability to hit a designated target with the appropriate effects that really matter. Bofors state that in the surface attack role, the 40mm can effectively hit a target at 10,000m. Which to be honest is a moot point, as the standard HE shell contains around 90g of high explosive. Which is only really useful for targets in the open, as you are now relying on shrapnel to do the damage rather than the blast effect. It would be next to useless against a bunker or an armoured vehicle such as a MBT for example.

            Even though the gun is rated at over 200 rounds per minute. The very small amount of explosive per shell, is unlikely to have the desired effects due to the shell’s small lethality radius. Therefore for targets in the open, lots of rounds will be needed to have an effect. Its the shell lethality radius that is the most important factor, especially when used against airborne targets. As you’re more relying on the proximity of the shell to the target, due to to the difficulty of merging two moving objects. The other issue for use against surface targets is that the Bofors uses one piece ammunition and therefore the propellent charge is a fixed quantity. Therefore you must use the gun’s barrel elevation to enable a “lobbing” shot for indirect fire, rather than direct fire that uses point and shoot. For indirect targets that are closer and requires the barrel to be elevated greater than 45 degrees. You now also need to include a time calculation, where the time on target has to account for the higher ballistic arc needed to reach the target. Not an impossible task, but just adds a bit more complexity to the shot.

    • Agree cost of taking down cheap enemy drones has to come down. The ammunition for this is not super cheap but lower price than missiles. Do think the ‘goalkeeper’ could be good at handling drones but it will be last chance saloon situation.

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