1. The hole on the tanker shown in the media is NOT a hole made by a Limpet mine! Limpet mines use a shaped charge to penetrate the hull. A shaped charge is a jet of molten metal piercing through the hull, and as such, the resulting hole looks molten through.
This is what a shaped charge penetration looks like: http://i.imgur.com/VGKD6Sz.jpg?1
And this is the hole left on the tanker:https://www.aljazeera.com/mritems/Images/2019/6/18/f35a03bae0824069975054576acaa129_18.jpg
In fact, the hole on that tanker looks more like a missile impact. The scorch marks around the impact site were created by the fuel of the missile burning after the impact.
2. The US now admit that they had an MQ-9 Reaper drone in the area, which is also the drone that supposed captured the footage of the Iranian boat that is all over the media. What was a US Reaper drone doing there? The MQ-9 Reaper is not used for general purpose surveillance, it is a recon/attack drone that usaully flies integrated with manned combat aircraft. And it can be armed with the AGM-114 Hellfire missile. Coincidentally, the hole on that tanker very closely resembles that of a Hellfire missile impact.
3. The Japanese crew of the tanker reports seeing flying objects in the sky at the time of the explosion. And we now know that the US had at least one MQ-9 Reaper in the area.
更新1:
It is pretty obvious what happened here. It was not any Limpet mine, it was the US MQ-9 Reaper drone that attacked the tanker with a Hellfire missile. And now the US is blaming Iran, knowing full well that Iran would be the first to respond to the distress call. It is the Gulf of Tonkin incident all over again.