@ElleGray very true and we could get international co ordination to do so.But to be fair I think part of this was experimental ,trying out technology and gadgets tyhat hadnt had a chance to be used except in test situations , to see what was possible if a sub was lost so deep , as I doubt many people involved in the search thought there was any real chance of them being rescued.Plus this played out over days when they might have still been alive.I think people were hoping for a miracle
@ElleGray @Helengraham There was a four-day search and over 100 people were rescued. The advanced tech they deployed to find the submarine is inapplicable to an overturned surface passenger vessel because they know where the vessel went down and it's not a watertight tube you can rescue people out of.