@Ewan Whosearmy Icebergs melt in warm saltwater quicker than in the air. That is the reason they capsize. You can sometimes estimate the time when an iceberg capsizes by the movements it makes, but it's very hard to. It's a lottery game to land on such icebergs. Maybe the weight of the helicopter is enough to make this happen. The other point is that icebergs drifted to warmer regions are very instable. They have caves and cracks and you never know what the weight of the helicopter or even the sound will do to such fragil structures. I landed on several table shaped icebergs in Antarctica to mark them with transmitters to make studies about drift and lifetime of icebergs. You can track them on the webside of the German Alfred Wegener Institute. These icebergs were about 500 x 500 Meters. I would never land on icebergs like shown in the picture at the beginning of this thread.
Always happy landings
Spencer17