Another war game carefully timed to coincide with Second World War celebrations.
But with Operation Swordfish you take the German side as a U-boat commander who has to stop an Allied invasion.
Your submarine has been damaged and is unable to dive below periscope depth.
To attack the aircraft, the U-boat must surface and fire its deck gun. But the sub becomes vulnerable on the surface when the convoy steams into view although its guns have a range of more than six miles.
Operation Swordfish is billed as "the ultimate war game". It's good but not that good.