Depth charge 40mm ammunition

Steve Johnson
by Steve Johnson

This interesting grenade, manufactured by Bulgarian firm ARCUS Co., is designed to combat frogmen. The AR476 is fired from standard 40mm launchers at the area where combat divers are suspected to be underwater. When the projectile hits the water, a time deployed fuse is activated.

Many thanks, again, to Lusaka for the photo and info.

Steve Johnson
Steve Johnson

I founded TFB in 2007 and over 10 years worked tirelessly, with the help of my team, to build it up into the largest gun blog online. I retired as Editor in Chief in 2017. During my decade at TFB I was fortunate to work with the most amazing talented writers and genuinely good people!

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  • J J on Apr 22, 2011

    sucks to be a combat diver!

  • Hagbard hednig Hagbard hednig on Dec 09, 2012

    Useless, but interesting.

    Honestly, if you see combat divers, haul ass out of there and use your RADIO to call in something bigger. CD:s are expensive and usually come with a *load of fire support. You shoot at them and you'll have the enemy navy's biggest guns turning your way in seconds.

    "Frogmen"/divers are usually not seen.

    They use rebreathers so you never see any bubbles. They can swim in, attach explosives to a ship and swim away before sinking your battleship.

    There are sensors which would detect divers, but those are what you'd see on a modern littoral warship, and would be integrated with the ship's other systems rather than with the foot soldiers guarding it.

    I the case of combat divers (reconnaissance/sabotage and so on), again a foot soldier wouldn't see bubbles and shoot a grenade into the water.